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Reveal fields if needed

I'm trying to make a contact-form in php. You can find it here.
I try to make the textbox with datepicker invisible until the visitor checks the radiobutton "ja", only then it needs to be visible.
Here's the code for the form:
var FormStuff = {
init: function() {
this.applyConditionalRequired();
this.bindUIActions();
},
bindUIActions: function() {
$("input[type='radio'], input[type='checkbox']").on("change", this.applyConditionalRequired);
},
applyConditionalRequired: function() {
$(".require-if-active").each(function() {
var el = $(this);
if ($(el.data("require-pair")).is(":checked")) {
el.prop("required", true);
} else {
el.prop("required", false);
}
});
}
};
FormStuff.init();
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<form method="post" action="mail.php">
<!--< ?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>-->
<table id="contactForm">
<tr>
<th colspan="2">Contact</th>
</tr>
<div>
<tr>
<td><label>Reservatie: </label></td>
<td>
<table>
<tr>
<td id="nospacing"><input type="radio" name="reservatie" value="Ja" id="ja"></td>
<td id="nospacing"><label for="reservatie">Ja</label></td>
<td id="nospacing"><input type="radio" name="reservatie" value="Nee" id="nee"></td>
<td id="nospacing"><label for="reservatie">Nee</label></td>
</tr>
</table>
</td>
</tr>
<div class="reveal-if-active">
<tr>
<td><label for="reservering">Reserveringsdatum: </label></td>
<td><input type="text" id="reservering" autocomplete="off" name="reservering" class="require-if-active" data-require-pair="#ja"></td>
</tr>
</div>
</div>
<tr>
<td><input type="submit" name="submit" value="Verzenden" /></td>
<td><input type="reset" value="Formulier wissen" class="alt" /></td>
</tr>
</table>
</form>

you use $('input[type="radio"]').click(function(){}) to detect you input change see code snippet.
var FormStuff = {
init: function() {
this.applyConditionalRequired();
this.bindUIActions();
},
bindUIActions: function() {
$("input[type='radio'], input[type='checkbox']").on("change", this.applyConditionalRequired);
},
applyConditionalRequired: function() {
$(".require-if-active").each(function() {
var el = $(this);
if ($(el.data("require-pair")).is(":checked")) {
el.prop("required", true);
} else {
el.prop("required", false);
}
});
}
};
FormStuff.init();
/* this is the function to handle you need */
$(function(){
$('input[type="radio"]').click(function(){
if ($('input[type="radio"]#ja').is(':checked'))
{
$(".reveal-if-active").show();
}
else if('input[type="radio"]#nee'){
$(".reveal-if-active").hide();
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<form method="post" action="mail.php">
<!--< ?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>-->
<table id="contactForm">
<tr>
<th colspan="2">Contact</th>
</tr>
<div>
<tr>
<td><label>Reservatie: </label></td>
<td>
<table>
<tr>
<td id="nospacing"><input type="radio" name="reservatie" value="Ja" id="ja"></td>
<td id="nospacing"><label for="reservatie">Ja</label></td>
<td id="nospacing"><input type="radio" name="reservatie" value="Nee" id="nee"></td>
<td id="nospacing"><label for="reservatie">Nee</label></td>
</tr>
</table>
</td>
</tr>
<div >
<!-- make the tr the element to hide and show -->
<tr class="reveal-if-active" style="display:none">
<td ><label for="reservering">Reserveringsdatum: </label></td>
<td><input type="text" id="reservering" autocomplete="off" name="reservering" class="require-if-active" data-require-pair="#ja"></td>
</tr>
</div>
</div>
<tr>
<td><input type="submit" name="submit" value="Verzenden" /></td>
<td><input type="reset" value="Formulier wissen" class="alt" /></td>
</tr>
</table>
</form>

Firstly, your markup is kinda messed up:
You shouldn't mix div tags with tr, only tr tags should be present on the same 'level' of nesting in table tag
Secondly, answering you actual question - add click event listeners on the radiobuttons, so that when YES is clicked, you make visible your "reveal-if-active" row:
var inputToHide = document.getElementsByClassName("reveal-if-active")[0];
var jaInput = document.getElementById("ja");
var neeInput = document.getElementById("nee");
function makeInputVisibleAgain() {
inputToHide.style.display = "block";
}
function hideInput() {
inputToHide.style.display = "none";
}
jaInput.addEventListener("click", makeInputVisibleAgain);
neeInput.addEventListener("click", hideInput);
Thirdly - don't use several ids with same name, better change your id="nospacing" to class

It is possible that you want something like this? Notice that it's very easy to do it in very few lines of code. Since you're a beginner I'll explain:
$( ... ); is jQuery's way to say "when the page is totally loaded, start executing what's inside". In case you didn't know, without this the scripts would start executing any time and could cause errors, mainly because of not finding the elements you work with.
$('input[name="reservatie"]').change(function(){ ... });: the radio buttons have name "reservatie", so when they are changed it will execute the function inside change().
$('#reveal').prop('hidden', !$('#ja').prop('checked'));: I identified the row of the table where the datepicker was as "reveal", because, maybe I'm wrong, but putting one row of it inside of a div didn't let my code go well, so I believe that was just wrong. I deleted the div and used the row instead. So, its attribute hidden will be the opposite of the checked property of "ja", which means, if "ja" is checked, the datepicker won't be hidden, and if it's not, it will.
Hope it helps you.
$(function(){
$('input[name="reservatie"]').change(function(){
$('#reveal').prop('hidden', !$('#ja').prop('checked'));
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<form method="post" action="mail.php">
<!--< ?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>-->
<table id="contactForm">
<tr>
<th colspan="2">Contact</th>
</tr>
<div>
<tr>
<td><label>Reservatie: </label></td>
<td>
<table>
<tr>
<td id="nospacing"><input type="radio" name="reservatie" value="Ja" id="ja"></td>
<td id="nospacing"><label for="reservatie">Ja</label></td>
<td id="nospacing"><input type="radio" name="reservatie" value="Nee" id="nee"></td>
<td id="nospacing"><label for="reservatie">Nee</label></td>
</tr>
</table>
</td>
</tr>
<tr id="reveal" hidden>
<td><label for="reservering">Reserveringsdatum: </label></td>
<td><input type="text" id="reservering" autocomplete="off" name="reservering" class="require-if-active" data-require-pair="#ja"></td>
</tr>
</div>
<tr>
<td><input type="submit" name="submit" value="Verzenden" /></td>
<td><input type="reset" value="Formulier wissen" class="alt" /></td>
</tr>
</table>
</form>

Disabling certain inputs in table on button press

I currently have a table that contains a few values, 2 input fields and a button for each row in that table. What I want to happen is that when I press the button in the third row, the input fields in the third row become disabled. The other rows should remain unaffected. Unfortunately, due to the nature of the program, adding ID's to the inputs and buttons is not possible.
Does anyone know of a good way to go about this?
<tr>
<td>Text A</td>
<td>Text B</td>
<td><input class="editable"></td>
<td>Text C</td>
<td><input class="editable></td>
<td>Text D</td>
<td><button class="disableInput">OK</button></td>
<tr>
I have ~40 rows like this
Also, due to the table constantly autosaving to a database (for the input) the table gets refreshed every ~0.5 seconds

$(tableId).on("click", "button", function(){
$(this).closest("tr").find("input").attr("disabled", true);
})

Since you are using jQuery, you can do something like this:
$(document).ready(function() {
$("table td .btn").click(function() {
if ($(this).closest("tr").find("input").attr("disabled") === "disabled"){
$(this).closest("tr").find("input").removeAttr("disabled", "disabled");
$(this).closest("tr").find("button").text("Disbale");
}
else{
$(this).closest("tr").find("input").attr("disabled", "disabled");
$(this).closest("tr").find("button").text("Enable");
}
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<table>
<tbody>
<tr>
<td>
<input type="text" />
</td>
<td>
<input type="text" />
</td>
<td>
<button class="btn" type="button" />Disable</button>
</td>
</tr>
<tr>
<td>
<input type="text" />
</td>
<td>
<input type="text" />
</td>
<td>
<button class="btn" type="button" />Disable</button>
</td>
</tr>
<tr>
<td>
<input type="text" />
</td>
<td>
<input type="text" />
</td>
<td>
<button class="btn" type="button" />Disable</button>
</td>
</tr>
</tbody>
</table>

You can do this via traversing the DOM.
$('.disableInput').on('click',function(){
var input = $(this).closest('tr').find('input');
var currstatus = input.prop('disabled');
input.prop('disabled',!currstatus);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<table>
<tr>
<td><input type="text" name="somthing[]"></td>
<td><input type="text" name="something[]"></td>
<td><button class="disableInput">Toggle Input</button></td>
</tr>
<tr>
<td><input type="text" name="somthing[]"></td>
<td><input type="text" name="something[]"></td>
<td><button class="disableInput">Toggle Input</button></td>
</tr>
<tr>
<td><input type="text" name="somthing[]"></td>
<td><input type="text" name="something[]"></td>
<td><button class="disableInput">Toggle Input</button></td>
</tr>
</table>

Subtracting the result of two sums

I'm trying to subtract two totals.
I have one table for incomes, were the final row is the "total incomes" and another table for expenses, with a final row for the "total expenses"
I need to add another function that calculates the total income minus the total expenses. I also need to show a negative amount in case the expenses are greater than the incomes.
My problem is, I don't quite understand how to use the value that its stored on my previous function so I can reuse it on the new one. I'm fairly new to javascript/jquery so I'm having troubles understanding the documentation.
Any guidance on this will be very much appreciated
Here is the js
$(document).ready(function () {
//iterate through each textboxes and add keyup
//handler to trigger sum event
$(".txtA").each(function () {
$(this).keyup(function () {
calculateSumA();
calculateSubstraction();
});
});
});
function calculateSumA() {
var sum = 0;
//iterate through each textboxes and add the values
$(".txtA").each(function () {
//add only if the value is number
if (!isNaN(this.value) && this.value.length != 0) {
sum += parseFloat(this.value);
}
});
//.toFixed() method will roundoff the final sum to 2 decimal places
$("#sumA").html(sum.toFixed(2));
}
$(document).ready(function () {
//iterate through each textboxes and add keyup
//handler to trigger sum event
$(".txt").each(function () {
$(this).keyup(function () {
calculateSum();
calculateSubstraction();
});
});
});
function calculateSum() {
var sum = 0;
//iterate through each textboxes and add the values
$(".txt").each(function () {
//add only if the value is number
if (!isNaN(this.value) && this.value.length != 0) {
sum += parseFloat(this.value);
}
});
//.toFixed() method will roundoff the final sum to 2 decimal places
$("#sum").html(sum.toFixed(2));
}
function calculateSubstraction() {
var subs = calculateSum() - calculateSumA();
$("#subs").html(subs.toFixed(2));
}
here is the html
<body>
<table width="300px" border="1">
<tr>
<td width="40px">1</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>2</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>3</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>4</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>5</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>6</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr class="income">
<td> </td>
<td align="right">total income:</td>
<td align="center"><span id="sumA">0</span>
</td>
</tr>
</table>
<br/>
<table width="300px" border="1">
<tr>
<td width="40px">1</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>2</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>3</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>4</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>5</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>6</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td> </td>
<td align="right">total expenses:</td>
<td align="center"><span id="sum">0</span>
</td>
</tr>
</table>
<br/>
<table width="300px" border="1">
<tr>
<td style="width:40px"></td>
<td style="width:62px">Remaining:</td>
<td align="center"><span id="su">0</span>
</td>
</tr>
</table>
http://jsfiddle.net/gnzLwzuy/5/
I know it could be optimized, as I'm repeating the code too much, but If I change it too much It stops working.
(I have too much to learn...)

Just to complement Guruprasad answer, and to responde directly to how can a function access a value calculated by another function.
The easy way:
1 - declare global variables and use them inside your functions.
var foo;
function calculateSumA() {
....
foo = some value;
}
function OtherFunc() {
....
var localVar = foo;
}
2 - make the functions return a value and store it somewhere other functions can access (e.g a global variable);
Not so simple way:
You can use closures to create the illusion of private members.
I wrote an article on JS Closures. I believe it will help you understand the concept quite well, if you are curious about it: https://usonsci.wordpress.com/2014/10/04/closure-with-javascript/

However you are calling calculateSubstraction on keyup of each textbox just take the value from total of each section and subtract it accordingly as below:
function calculateSubstraction() {
var subs=parseFloat($("#sumA").text()) - parseFloat($("#sum").text())
$("#su").html(subs);
}
DEMO
Update
Here is the more optimized version of your code. I prefer blur event than keyup since its more reliable to calculate and reduces the firing of event on every keypress
$(document).ready(function () {
var income = 0;//variable to hold income
var expense= 0; //variable to hold expense
$(".txtA,.txt").blur(function () { //attach event to multiple elements
$(this).each(function () {//loop through each of them
if (!isNaN(this.value) && this.value.length != 0) {
if($(this).hasClass('txt')) //if it is expense
expense += parseFloat(this.value); //add it to expense
else
income+=parseFloat(this.value); //add it to income
}
});
if($(this).hasClass('txt'))
$("#sum").html(expense.toFixed(2)); //display based on income or expense
else
$("#sumA").html(income.toFixed(2));
calculateSubstraction();//this remains same
});
});
Updated DEMO

DEMO
You need to return a value from the add functions so add
return sum.toFixed(2);
return sum.toFixed(2);
from the two function and did the subtraction from the subtract function
var data = calculateSum();
var dataa = calculateSumA();
var subs = dataa-data;
$("#su").html(subs.toFixed(2));

Just Replace your calculateSubstraction() function with this :
function calculateSubstraction() {
var Income = parseFloat($('#sumA').html());
var Expense = parseFloat($('#sum').html());
var subs = Income - Expense;
$("#su").html(subs.toFixed(2));
}

Using jQuery, you can have a simple calculation like
jQuery(function() {
var sum = {
income: 0,
deduction: 0
};
$('input.entry').keyup(function() {
var $table = $(this).closest('table'),
total = 0;
$table.find('input.entry').each(function() {
total += +this.value || 0;
});
$table.find('span.total').html(total)
sum[$table.data('type')] = total;
$('#su').html(sum.income - sum.deduction);
})
})
body {
font-family: sans-serif;
}
table {
border-collapse: collapse;
border-color: white;
background-color: powderblue;
}
input.entry {
background-color: #FEFFB0;
font-weight: bold;
text-align: right;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table width="300px" border="1" class="entry" data-type="income">
<tr>
<td width="40px">1</td>
<td>income</td>
<td>
<input class="txtA entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>2</td>
<td>income</td>
<td>
<input class="txtA entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>3</td>
<td>income</td>
<td>
<input class="txtA entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>4</td>
<td>income</td>
<td>
<input class="txtA entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>5</td>
<td>income</td>
<td>
<input class="txtA entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>6</td>
<td>income</td>
<td>
<input class="txtA entry" type="text" name="txt" />
</td>
</tr>
<tr class="income">
<td> </td>
<td align="right">total income:</td>
<td align="center"><span class="total">0</span>
</td>
</tr>
</table>
<br/>
<table width="300px" border="1" class="entry" data-type="deduction">
<tr>
<td width="40px">1</td>
<td>expense</td>
<td>
<input class="txt entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>2</td>
<td>expense</td>
<td>
<input class="txt entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>3</td>
<td>expense</td>
<td>
<input class="txt entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>4</td>
<td>expense</td>
<td>
<input class="txt entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>5</td>
<td>expense</td>
<td>
<input class="txt entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td>6</td>
<td>expense</td>
<td>
<input class="txt entry" type="text" name="txt" />
</td>
</tr>
<tr>
<td> </td>
<td align="right">total expenses:</td>
<td align="center"><span class="total">0</span></td>
</tr>
</table>
<br/>
<table width="300px" border="1">
<tr>
<td style="width:40px"></td>
<td style="width:62px">Remaining:</td>
<td align="center"><span id="su">0</span>
</td>
</tr>
</table>

I've made a pure Javascript version of your code, and added two new functionalities:
A button to dynamically add new rows to the income and expense tables.
And remove the ability of user adding anything other than numbers to the textfields.
The full commented code is below:
/* when all elements of the page are available */
document.addEventListener('DOMContentLoaded', function() {
/* get the tables income and expense, and the 'total' fields */
var income = document.getElementById('income'),
expense = document.getElementById('expense'),
totalIncome = document.getElementById('totalIncome'),
totalExpense = document.getElementById('totalExpense'),
total = document.getElementById('total');
/* create the calculate function */
function calculate(e) {
/* get all the textfields of each table */
var incomes = [].slice.call(income.querySelectorAll('input')),
expenses = [].slice.call(expense.querySelectorAll('input'));
/* calculate the sum of the fields by using
- map to convert the values to numbers
- and reduce to sum those values */
var sumIncome = incomes.map(function(el) {
/* don't allow users to input other values than numbers */
el.value = el.value.replace(/[^0-9\.]/g, '');
return Number(el.value);
}).reduce(function(a, b) {
return a + b;
});
var sumExpense = expenses.map(function(el) {
/* don't allow users to input other values than numbers */
el.value = el.value.replace(/[^0-9\.]/g, '');
return Number(el.value);
}).reduce(function(a, b) {
return a + b;
});
/* change the totalIncome and totalExpense labels */
totalIncome.textContent = sumIncome;
totalExpense.textContent = sumExpense;
/* change the total remaining label */
total.textContent = sumIncome - sumExpense;
}
/* add the event handlers to the oninput event to both tables
they will call the calculate function above when they happen */
income.addEventListener('input', calculate);
expense.addEventListener('input', calculate);
/* this is a bonus, I've added 'new' buttons to dynamically add more rows */
document.addEventListener('click', function(e) {
var el = e.target;
if (el.className === 'new') {
var table = el.parentNode.parentNode.parentNode,
tr = document.createElement('tr');
tr.innerHTML = '<td>' + [].slice.call(table.querySelectorAll('tr')).length + '</td>\
<td>income</td>\
<td>\
<input class="txtA" type="text" />\
</td>';
table.insertBefore(tr, el.parentNode.parentNode);
}
});
});
body {
font-family: sans-serif;
}
table {
border-collapse: collapse;
border-color: white;
background-color: powderblue;
}
.txt,
.txtA {
background-color: #FEFFB0;
font-weight: bold;
text-align: right;
}
<table id='income' width="300px" border="1">
<tr>
<td width="40px">1</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>2</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>3</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>4</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>5</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr>
<td>6</td>
<td>income</td>
<td>
<input class="txtA" type="text" name="txt" />
</td>
</tr>
<tr class="income">
<td>
<button class="new">new</button>
</td>
<td align="right">total income:</td>
<td align="center"><span id="totalIncome">0</span>
</td>
</tr>
</table>
<br/>
<table id='expense' width="300px" border="1">
<tr>
<td width="40px">1</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>2</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>3</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>4</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>5</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>6</td>
<td>expense</td>
<td>
<input class="txt" type="text" name="txt" />
</td>
</tr>
<tr>
<td>
<button class="new">new</button>
</td>
<td align="right">total expenses:</td>
<td align="center"><span id="totalExpense">0</span>
</td>
</tr>
</table>
<br/>
<table width="300px" border="1">
<tr>
<td style="width:40px"></td>
<td style="width:62px">Remaining:</td>
<td align="center"><span id="total">0</span>
</td>
</tr>
</table>

check file is selected or not

<table style="width:100%" cellpadding = 0 cellspacing=0>
<tbody>
<tr>
<td align="center" style="text-align:center;height:60px;">
<input style="align:center;" class="multi" type="file" multiple="multiple" id="pic1" name="picture">
</td>
</tr>
<tr>
<td align="center" style="text-align:center;height:60px;">
<input type="file" multiple="multiple" id="pic2" class="multi" name="picture">
</td>
</tr>
<tr>
<td align="center" style="text-align:center;height:60px;">
<input type="file" multiple="multiple" id="pic3" class="multi" name="picture">
</td>
</tr>
<tr>
<td align="center" style="text-align:center;height:60px;">
<input type="file" multiple="multiple" id="pic4" class="multi" name="picture">
</td>
</tr>
<tr>
<td align="center" style="text-align:center;height:60px;">
<input type="file" multiple="multiple" id="pic5" class="multi" name="picture">
</td>
</tr>
<tr>
<td align="center" style="text-align:center;height:60px;">
<input type="submit" value="Upload" style="border:0 none;width:30%; font-size:20px;height:35px;background-color:#44C1D3;color:white;border-radius:5px;-webkit-border-radius: 5px;" />
</td>
</tr>
</tbody>
</table>
i want to check if any one input file is selected.
may be its first or last. i just want to generate some popup if no file is seleted.but if one file is selected it returns true

Try this:
$('#pic1').change(
function(e){
console.log(this.files)
}
)
This will detect a file selection on the first input type. You can fetch the files attribute of each input tag and make a decision based on that.
http://jsfiddle.net/uwobenbt/
EDIT: Here is the complete code http://jsfiddle.net/uwobenbt/5/
function test() {
var count = 0;
$('.multi').each(
function(d){
if(this.files.length != 0) count ++
}
)
if(count) alert('files are selected')
else alert ('no files selected')
}

How Can i make a table section hidden and display after click

Here is what i am doing.. its categorized table where when clicked to button shows detail regarding otherwise remain hidden, CSS is working good for me, problem is when i click on button to display tbody nothing happens, can't get what's wrong with it. have a look on my code..
css for make him hidden unless he is not clicked,
.down1 {
display: none;
}
$(document).ready(function(){
$("#show1").click(function(){
$(".down1").toggle();
});
});
<table align="center" cellpadding="10" width="300">
<tr>
<th bgcolor="brown"></th>
<th bgcolor="brown">Day</th>
<tr>
<td align="center" bgcolor="lightgrey">
<input type="button" value="+" id="show1" />
</td>
<td align="center" bgcolor="lightgrey">Monday</td>
<tbody class="down1">
<tr>
<td>
<input type="checkbox" />
</td>
<td>9:00 -10:00 (time) </td>
</tr>
<tr>
<td>
<input type="checkbox" />
</td>
<td>9:00 -10:00 (time)</td>
</tr>
<tr>
<td>
<input type="checkbox" />
</td>
<td>9:00 -10:00 (time)</td>
</tr>
<tr>
<td>
<input type="checkbox" />
</td>
<td>9:00 -10:00 (time)</td>
</tr>
<tr>
<td>
<input type="checkbox" />
</td>
<td>9:00 -10:00 (time)</td>
</tbody>
</tr>
</tr>
</table>

This example can help you : Example
$(document).ready(function(){
$("#show1").click(function(){
$(".down1").toggle();
if ($(this).val() == '+') {
$(this).val('-');
} else $(this).val('+');
});
});

Not sure but is this what you want?
JSfiddle:
http://jsfiddle.net/yoy5xph3/1/
$(".down1").toggle();
$("#show1").click(function(){
$(".down1").toggle();
});
I removed the css and toggled the .down1 at the start so it hides.

You can show my DEMO CODE
It's working
Jquery
$(document).ready(function(){
$("#show1").click(function(){
$(".down1").toggle();
if ($(this).val() == '+') {
$(this).val('-');
} else $(this).val('+');
});
});
Markup
<tbody class="down1">
<tr>
<td><input type="checkbox" /></td><td>9:00 -10:00 (time) </td>
</tr>
<tr>
<td><input type="checkbox" /></td><td>9:00 -10:00 (time) </td>
</tr>
<tr>
<td><input type="checkbox" /></td><td>9:00 -10:00 (time) </td>
</tr>
<tr>
<td><input type="checkbox" /></td><td>9:00 -10:00 (time) </td>
</tr>
<tr>
<td><input type="checkbox" /></td><td>9:00 -10:00 (time) </td>
</tr>
</tbody>