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Creating a list of students and assigning a function to each button

I am trying to allow clients to create a list of students then view more info by simply clicking on the button with the students name. I've got it to create the button and display the students name in the button but it only calls the function when I click submit to add the student to the list, the actual student button doesn't seem to function.
function updateStudentList() {
var html = "";
for (var i = 0; i < students.length; i++) {
html += "<li><button type='button' class='studentButton'" + "id=" + students[i].name +">" + students[i].name + "</button></li>";
}
$('#studentList').html(html);
for (var i = 0; i < students.length; i++) {
document.getElementById(students[i].name).addEventListener('click', openStudentInfo(students[i].name));
}
}
function openStudentInfo(studentName) {
console.log("Opening " + studentName + " info.");
var studentInfo = requestStudentByName(studentName);
if (studentInfo != null) {
var studentInfoForm = $("#studentInfoForm");
var html = "";
html += "<h3>Student Name: " + studentInfo.name + "</h3>";
html += "<h3>Student ID: " + studentInfo.studentID + "</h3>";
studentInfoForm.html(html);
$("#studentInfoModal").show();
}
}
HTML:
<ul data-role="listview" id="studentList"> </ul>
Note: I can't use the onclick tag in HTML, it causes security issues. Cordova also blocks this.

The way you binding the event is not ok. Try binding this way:
$(document).ready(function() {
$("#studentList").on("click", ".studentButton", function() {
var studentId = $(this).data("studentid");
openStudentInfo(studentId);
});
});
And in your HTML generation:
html += "<li><button type='button' class='studentButton' data-studentid='" + students[i].studentID +"'>" + students[i].name + "</button></li>";
This kind of event delagation works not metter how you create the elements inside the root element(studentList in this case), because the event was bound in it, and not on the dynamic elements.

no jquery version of DontVoteMeDown's answer
document.getElementById('studentList').addEventListener('click', function(event) {
var clickedEl = event.target;
if(clickedEl.className === 'studentButton') {
var studentId = clickedEl.dataset.studentId;
openStudentInfo(studentId);
}
});

jquery added html code not worked

I started new project and I use jquery to add content to article
when I create a slider with this code:
$(".inserttabtext1").click(function () {
var count = parseInt($(".firsttabtextcount").attr("name"), 10);
var name = parseInt($(this).attr("name"));
var id = "#" + name;
var idi,idt,content,idic,idtc;
content = "<div class='short-tabs'><ul>";
for (var i = 1; i <= count; i++)
{
idi = "#ftti" + i;
idic = $(idi).val();
if (i == 1)
{
content += "<li class='active'><a href='#'> " + i + idic + "</a></li>";
}
else
{
content += "<li><a href='#'> "+ i + idic +"</a></li>";
}
}
content += "</ul>";
for (var i = 1; i <= count; i++)
{
if (i==1)
{
content += "<div class='active'>";
}
else
{
content += "<div>";
}
idt = "#fttt" +i;
idtc = $(idt).val();
content += "<p class='text-go-center'>"+idtc+"</p></div>";
}
content += "</div>";
$(id).html(content);
});
and put them into html code my text slider not worked
but when I put manual html code in my page it work
I use these code for copy my html code
$(id).html(content);
$(id).append(content);
where is my wrong?

create a function and put your slider codes inside it, then call it in $(document).ready, and call it again after adding html
$(document).ready(function(){
Init();
});
function Init(){
//Call your slide function here
}
call Init after Adding Html
$(id).html(content);
$(id).append(content);
Init();

How to add additional functionalities?

I got a simple JavaScript based blog . First have a look at the below codes and I will ask my question.
Index.html have the following codes in its body
<script language="javascript" type="text/javascript" src="blog/config.js"> </script>
<script language="javascript" type="text/javascript" src="blog/single.js"> </script>
<script language="javascript" type="text/javascript" src="blog/posts.js"> </script>
config.js has
//This is the configuration file of the blog system.
//change these variables to suit your style and needs
var head = "h2"; //the heading style, ex. h1, h2, ect. use "h2" rather than "<h2>"
var text = "text"; //the text style, from your style sheet, it's in a <div> tag
var divider = "<hr>"; //the division between posts
var newer = "newer"; //the class for the link to the next newest page
var older = "older"; //the class for the link to the next oldest page
var pageclass = "page"; //the class for the text that displays the page number
var dateclass = "date"; //the class for the date
var pagesize = 4; //the number of posts on each page
var navclass = nav; //the configuration for the navigation`
posts.js
var posts = 1; //add 1 to this after adding a post. should be equal to the id of the newest post.
initblog(posts);
var id = 1; //make sure that this number is one greater than the one below it
var date = "mm/dd/yyyy"; //The date of the post
var heading = "Post 1"; //The title
var entry = ""; //reset the string
//don't worry about formatting and stuff like that, the system takes care of it all for us.
//VV your entry VV
entry += "<p>Wow, this post is on another page, If you have this many real posts, congratulations!</p>";
//^^ The most important part ^^
add_entry(id,date,heading,entry); //adds the entry to the blog
single.js
var maxpost;
function initblog(posts){
maxpost = posts;
var address = window.location.search;
if (address.substring(0, 1) == '?') {
page = address.substring(1);
} else{
window.location = "post.html?" + posts;
}
page = parseInt(page);
if (page > maxpost){
page = maxpost;
}
if (page < 1){
page = 1;
}
}
function add_entry(id,date,heading,entry) {
for (i=page;i>page - 1;i--){
if (id == i){
var entrytext = "";
entrytext += "<div class=" + text + ">";
entrytext += "<" + head + ">";
entrytext += "<a name=" + id + "></a>";
entrytext += "<span class='date'>[" + date + "]</span> ";
entrytext += heading;
entrytext += "</" + head + ">";
entrytext += entry;
entrytext += "</div>" + divider;
document.write(entrytext);
}
}
}
function pages(){
entrytext = ""
entrytext += "<table class=\"nav\"><tr>";
entrytext += "<td width=25% class = " + newer + ">&nbsp";
if (page < maxpost){
entrytext += "<A HREF=javascript:prev()>Newer Posts </A>";
}
entrytext += "</td><td width=50% class = " + pageclass + "><br><A HREF=javascript:newest()> Back to Index</A></td>";
entrytext += "<td width=25% class = " + older + ">&nbsp";
if (page-1 > 0){
entrytext += "<A HREF=javascript:next()>Older Posts</A>";
}
entrytext += "</td></table>";
entrytext += "";
document.write(entrytext);
}
function next(){
page = page - 1;
if (page < 1) {
page = page + 1;
}
window.location = "post.html?" + page;
}
function prev(){
page = page + 1;
if (page > maxpost) {
page = maxpost;
}
window.location = "post.html?" + page;
}
function newest(){
window.location = "index.html?" + maxpost;
}
Well , this is the whole blog script . I ain't added styles and you may see the comments on each lines for simplicity.
This blog doesn't have options to add title and meta description , keyword etc. Due to the style of applying it can do nothing outside the body tag.
1 . How to add an option to take/load titles?
2 . How to add the feature to load meta tag?
Don't tell me to edit and add titles on the template (index.HTML) , because that make no sense

As you see the heading block is for the title of the blog. All you need is just making it more visible.
var entrytext = "";
entrytext += "<div class=" + text + ">";
entrytext += "<h1>" + heading + "</h1>";
entrytext += "<" + head + ">";
entrytext += "<a name=" + id + "></a>";
entrytext += "<span class='date'>[" + date + "]</span> ";
entrytext += "</" + head + ">";
entrytext += entry;
entrytext += "</div>" + divider;
document.write(entrytext);
document.title = heading;
This will solve your problem about titles.
Regarding to meta tags, usually (actually by standard) meta tags are written betweeen <head> tags in HTML. To make it SEO compilant you need add them into these tags. More detailed: http://www.w3schools.com/tags/tag_meta.asp
But, if this code is generated on client-side. There is no meaning to generate it, because search engine will not parse on-fly generated meta tags. Because it's executed on browser.

Javascript attach new property to element

I have an object, X, and some code that creates a div and assigns id = X.ID. After the html is created, I assign the object to the div, like this:
document.getElementById(X.ID).XValue = X;
If I set a break after that statement, I can evaulate document.getElementById(X.ID).XValue and see all the properties of X.
While I was creating the html, I added onmouseup="MOUSE_UP(event)".
var aProp = {};
aProp.ThisValue = "This";
aProp.ThatValue = "That";
aProp.Id = 5;
var html = '<div id="' + aProp.Id + '"';
var func = 'MOUSE_UP';
html += ' onmouseup="' + func + '(event) ">';
html += '</div>';
document.getElementById("test").innerHTML += html;
document.getElementById(aProp.Id).XVALUE = aProp;
function MOUSE_UP(event) {
alert(event.currentTarget.XValue.ThisValue);
}
Now, when I set a break at MOUSE_UP, event.currentTarget is my div (event.currentTarget.id == X.ID), but event.currentTarget.XValue is undefined.
Why is XValue undefined here when it was defined earlier?

Looks like setting innerHTML of #test would wipe out all custom properties from its children. You can check this in the jsFiddle. When you'll run the fiddle as it is, you'll notice NewProp of #1 will become undefined after adding more content with test.innerHTML += ... If you log tabIndex instead of NewProp, you'll get the correct values.
This happens because += operator is just a shortcut for a statement like a = a + b, which can also be written a += b.
Basicly you create a string from the inner HTML of #test, then add another string to it, and finally replace the original innerHTML of #test with this new string. All previous elements in #test are replaced with new ones, which don't have the custom properties set.
When setting id property for an element, also id attribute is added to the HTML, hence they are a part of innerHTML of #test, and are added to the newly created HTML too.
If you use proper DOM manipulation instead of setting innerHTML, you'll get the results you want. The code below uses createElement() and appendChild() methods instead of setting innerHTML.
function myMouseUp(e) {
alert("at MouseUp " + e.currentTarget.NewProp.ThisValue);
}
function buildOneDiv(aProp) {
var html = document.createElement('div');
aProp.ThisValue = 'This is ' + aProp.id;
aProp.ThatValue = 'That is ' + aProp.id;
html.id = aProp.id;
html.addEventListener('mouseup', myMouseUp, false);
html.innerHTML = 'Test ' + aProp.id;
return html;
}
function buildDivs(x) {
var html = buildOneDiv(x);
document.getElementById("test").appendChild(html);
document.getElementById(x.id).NewProp = x;
}
window.onload = function () {
var aProp, i;
for (i = 1; i < 4; i++) {
aProp = {};
aProp.id = i;
buildDivs(aProp);
}
};
A live demo at jsFiddle.

This is not so much an answer as it is a clarification and a work-around.
Given this html
<div id="test"></div>
and this code
function myMouseUp(e) {
alert("at MouseUp " + e.currentTarget.NewProp.ThisValue);
}
function buildOneDiv(aProp) {
aProp.ThisValue = "This";
aProp.ThatValue = "That";
var html = '<div id="' + aProp.id + '"';
var func = 'myMouseUp';
html += ' onmouseup="' + func + '(event) ">';
html += 'Test ' + aProp.id + '</div>';
return html;
}
function buildDivs(x) {
var html = buildOneDiv(x);
document.getElementById("test").innerHTML += html;
document.getElementById( x.id ).NewProp = x;
}
window.onload = function () {
for (var i = 1; i < 4; i++) {
var aProp = {};
aProp.id = i;
buildDivs(aProp);
}
};
The end result is that only the LAST div whose onmouseup is defined will have a legitimate value for NewProp at myMouseUp. For each other div, this property is undefined. This is why I got some comments indicating that "It does work." It works for ONE, which is all I had in my example. (This is the clarification.)
My workaround is to add a global object to be an associative array and change two statements:
var myDivs = {}; // global
Replace
document.getElementById( x.id ).NewProp = x;
in buildDivs with
myDivs[x.id] = x;
and replace
alert("at MouseUp " + e.currentTarget.NewProp.ThisValue);
in myMouseUp with
alert(myDivs[e.currentTarget.id].ThisValue );.
I'd still like to know why the original approach doesn't work.

Changing the content of all <pre> tags using JavaScript

I want to know how I change all the pre tags inside a document...
I'm using this:
var preContent = document.getElementById('code').innerHTML;
but this only changes the content of 1 pre tag... the one with the ID 'code'.
If you can show me how i can change all the pre tags using JavaScript I appreciate
Here's all the code:
window.onload = function () {
var preContent = document.getElementById('code').innerHTML;
var codeLine = new Array();
var newContent = '<table width="100%" border="1" '
+ 'cellpadding="0" cellspacing="0" >';
codeLine = preContent.split('\n');
for (var i = 0; i < codeLine.length; i++) {
newContent = newContent + '<tr><td class="codeTab1" >'
+ i.toString() + '</td><td class="codeTab2">'
+ codeLine[i] + '</td></tr>';
}
newContent = newContent + '</table>';
document.getElementById('code').innerHTML = newContent;
}
PS: This is to make a look like a normal compiler with numbers before the line
PPS: Each pre tag will have a different content and I want the same script to change it (if possible).

You can use getElementsByTagName:
var preElements = document.getElementsByTagName('pre');
for(var i = 0; i < preElements.length; ++ i)
{
var element = preElements[i];
/* modify element.innerHTML here */
}

First problem in you code . No two elements in a document can have same id .
So you can change it easily with jquery . look at the code .
$('pre').html("what ever text you want to show ");
Or with javascript you can do like this :
var x = document.getElementsByTagName('pre');
for(var i = 0; i < x.length; ++ i)
{
x.innerHTML = "what ever text you want to show";
}