please be nice. I'm trying to create a page which sets limit and cut the excess (from the specified limit). Example: Limit is 3. then, I'll input abc if I input d it must say that its limit is reached and the abc will remain. My problem is that it just delete my previous input and make new inputs. Hoping for your great cooperation. Thanks.
<html>
<script type="text/javascript">
function disable_btn_limit(btn_name)
{
/* this function is used to disable and enable buttons and textbox*/
if(btn_name == "btn_limit")
{
document.getElementById("btn_limit").disabled = true;
document.getElementById("ctr_limit_txt").disabled = true;
document.getElementById("btn_edit_limit").disabled = false;
}
if(btn_name == "btn_edit_limit")
{
document.getElementById("btn_limit").disabled = false;
document.getElementById("ctr_limit_txt").disabled = false;
document.getElementById("btn_edit_limit").disabled = true;
}
}
function check_content(txtarea_content)
{
/*This function is used to check the content*/
// initialize an array
var txtArr = new Array();
//array assignment
//.split(delimiter) function of JS is used to separate
//values according to groups; delimiter can be ;,| and etc
txtArr = txtarea_content.split("");
var newcontent = "";
var momo = new Array();
var trimmedcontent = "";
var re = 0;
var etoits;
var etoits2;
//for..in is a looping statement for Arrays in JS. This is similar to foreach in C#
//Syntax: for(index in arr_containter) {}
for(ind_val in txtArr)
{
var bool_check = check_if_Number(txtArr[ind_val])
if(bool_check == true)
{
//DO NOTHING
}
else
{
//trim_content(newcontent);
newcontent += txtArr[ind_val];
momo[ind_val] = txtArr[ind_val];
}
}
var isapa = new Array();
var s;
re = trim_content(newcontent);
for(var x = 0; x < re - 1; x++){
document.getElementById("txtarea_content").value += momo[x];
document.getElementById("txtarea_content").value = "";
}
}
function trim_content(ContentVal)
{
//This function is used to determine length of content
//parseInt(value) is used to change String values to Integer data types.
//Please note that all value coming from diplay are all in String data Type
var limit_char =parseInt(document.getElementById("ctr_limit_txt").value);
var eto;
if(ContentVal.length > (limit_char-1))
{
alert("Length is greater than the value specified above: " +limit_char);
eto = limit_char ;
etoits = document.getElementById("txtarea_content").value;
//document.getElementById("txtarea_content").value = "etoits";
return eto;
//for(var me = 0; me < limit_char; me++)
//{document.getElementById("txtarea_content").value = "";}
}
return 0;
}
function check_if_Number(ContentVal)
{
//This function is used to check if a value is a number or not
//isNaN, case sensitive, JS function used to determine if the values are
//numbers or not. TRUE = not a number, FALSE = number
if(isNaN(ContentVal))
{
return false;
}
else
{ alert("Input characters only!");
return true;
}
}
</script>
<table>
<tr>
<td>
<input type="text" name="ctr_limit_txt" id="ctr_limit_txt"/>
</td>
<td>
<input type="button" name="btn_limit" id="btn_limit" value="Set Limit" onClick="javascript:disable_btn_limit('btn_limit');"/>
</td>
<td>
<input type="button" name="btn_edit_limit" id="btn_edit_limit" value="Edit Limit" disabled="true" onClick="javascript:disable_btn_limit('btn_edit_limit');"/>
</td>
</tr>
<tr>
<td colspan="2">
<textarea name="txtarea_content" id="txtarea_content" onKeyPress="javascript:check_content(this.value);"></textarea>
<br>
*Please note that you cannot include <br>numbers inside the text area
</td>
</tr>
</html>
Try this. If the condition is satisfied return true, otherwise return false.
<html>
<head>
<script type="text/javascript">
function check_content(){
var text = document.getElementById("txtarea_content").value;
if(text.length >= 3){
alert('Length should not be greater than 3');
return false;
} else {
return true;
}
}
</script>
</head>
<body>
<div>
<textarea name="txtarea_content" id="txtarea_content" onkeypress=" return check_content();"></textarea>
</div>
</body>
</html>
Instead of removing the extra character from the text area, you can prevent the character from being written in the first place
function check_content(event) { //PARAMETER is the event NOT the content
txtarea_content = document.getElementById("txtarea_content").value; //Get the content
[...]
re = trim_content(newcontent);
if (re > 0) {
event.preventDefault(); // in case the content exceeds the limit, prevent defaultaction ie write the extra character
}
/*for (var x = 0; x < re - 1; x++) {
document.getElementById("txtarea_content").value += momo[x];
document.getElementById("txtarea_content").value = "";
}*/
}
And in the HTML (parameter is the event):
<textarea ... onKeyPress="javascript:check_content(event);"></textarea>
Try replacing with this:
for(var x = 0; x < re - 6; x++){
document.getElementById("txtarea_content").value += momo[x];
document.getElementById("txtarea_content").value = "";
}
Any reason why the maxlength attribute on a text input wouldn't work for so few characters? In your case, you would have:
<input type="text" maxlength="3" />
or if HTML5, you could still use a textarea:
<textarea maxlength="3"> ...
And then just have a label that indicates a three-character limit on any input.
Related
I want to replace a number over 100 with commas. Like 1000 to 1,000 and 1000000 to 1,000,000 etc. in HTML. I have found the code on here to do so but it only works with predetermined numbers being passed. I don't want it to work for a predetermined number but for any number typed into the box.
<label for="turnover">Estimated Monthly Card Turnover:</label><br />
<span>£ </span><input type="text" id="turnover" maxlength="11"
name="turnover" size="10" required>*
<br /><br />
<script type="text/javascript">
$('#turnover').keydown(function(){
var str = $(this).val();
str = str.replace(/\D+/g, '');
$(this).val(str.replace(/\B(?=(\d{3})+(?!\d))/g, ","));});
</script>
I created a solution using pure javascript.
function onChange(el) {
var newValue = el.value.replace(/,/g, '');
var count = 0;
const last = newValue.substring(newValue.length - 1, newValue.length); // last input value
// check if last input value is real a number
if (!isNumber(last)) {
el.value = el.value.substring(0, el.value.length - 1);
return;
}
newValue = newValue.split('')
.reverse().map((it) => {
var n = it;
if (count > 0 && count % 3 == 0) n = n + ',';
count++;
return n;
})
.reverse().join('')
el.value = newValue
// document.getElementById('value').innerHTML = newValue
}
function isNumber(input) {
return input.match(/\D/g) == undefined;
}
<label>Number</label>
<input id="numbers" onkeyup="onChange(this)">
There are a couple of issues with your code:
It runs once when the page loads, not after that. I added a button to fix that.
The id used in your code does not match the actual id of the input field.
Input fields must be read and written using .val(). .text() works only for divs, spans etc.
Note that the conversion now works one time, after that it fails to properly parse the new text which now contains the comma(s).
function numberWithCommas(x) {
return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}
function ShowComma() {
console.clear();
var val = parseInt($("#comma").val());
console.log(val);
val = numberWithCommas(val);
console.log(val);
$("#comma").val(val);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label for="turnover">Estimated Monthly Card Turnover:</label><br />
<span>£ </span><input type="value" id="comma" maxlength="30" name="turnover" size="10" required>*
<button onclick="ShowComma()">Show Comma</button>
To finalise this I have putgetElementById functions in so that this will work with a wordpress contact form 7. This must be with a text field though as it will not work with the number field as it will now accept commas:
<script>
document.getElementById("averagetrans").onkeyup = function() {onChange(this)};
document.getElementById("Turnover").onkeyup = function() {onChange(this)};
</script>
<script type="text/javascript">
function onChange(el) {
var newValue = el.value.replace(/,/g, '');
var count = 0;
const last = newValue.substring(newValue.length - 1, newValue.length); // last input value
// check if last input value is real a number
if (!isNumber(last)) {
el.value = el.value.substring(0, el.value.length - 1);
return;
}
newValue = newValue.split('')
.reverse().map((it) => {
var n = it;
if (count > 0 && count % 3 == 0) n = n + ','; // put commas into numbers 1000 and over
count++;
return n;
})
.reverse().join('')
el.value = newValue
// document.getElementById('value').innerHTML = newValue
}
function isNumber(input) {
return input.match(/\D/g) == undefined;
}
</script>
It should compare the texts and update it. I am using onkeyup for each time text is updated.
$(document).ready(function() {
$("#color").keyup(validate);
});
function validate() {
var password1 = $("#color").val();
var pass = $('#coltext').text();
var length = $("#color").val().length;
for (int i = 0; i < length; i++) {
if (pass[i] == password1[i]) {
$("#coltext").css("color", "green"); //make only correct character green
} else {
$("#coltext").css("color", "red");
}
}
}
<input id="color" type="text" />
<p id="coltext">This</p>
So what I want to do is whenever I type the "This" written should update character by character, green for correct and red for wrong. You can say like what typing tutor does.
You have to break the password into spans in order to style them seperately, then to compare then use $("#coltext span").eq(i).text() instead of pass[i];
$(document).ready(function() {
$("#color").keyup(validate);
});
function validate() {
var password1 = $("#color").val();
// put each of your password chars in a span
var pass = "<span>"+$('#coltext').text().split("").join("</span><span>")+"</span>";
$('#coltext').html(pass);
var length = $("#color").val().length;
for (var i = 0; i < length; i++) {
if ($("#coltext span").eq(i).text() == password1[i]) {
$("#coltext span").eq(i).css("color", "green"); //make only correct character green
} else {
$("#coltext span").eq(i).css("color", "red");
}
}
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input id="color" type="text" />
<p id="coltext">This</p>
<!DOCTYPE html>
<html>
<body>
<script>
var x = "Cancelled";
var y = "Cancelled";
if(x==y)
{
alert("equal");
}
else
{
alert("not equal");
}
</script>
</body>
</html>
I am struggling already for some time to create script that deletes and adds values to field. The point is that when I click on div - there will be images inside, it will copy part of its class to field, or remove if it's already copied there. All the values in field input_8_3 need to be comma separated without spaces except the last one and in case there is only one value there shouldn't be any comma. The same with field input_8_4, but there I need only erased values.
In addition I need divs to change class on click, one click to add class, another to remove it, but this is how far could I get with my issue.
I need this for deleting images in custom field in Wordpresses frontend. input_8_3 goes to meta and input_8_4 to array in function to delete chosen images.
Thanks in advance!
(function($){
$('.thumbn').click(function() {
var text = $(this).attr("id").replace('img-act-','')+',';
var oldtext = $('#input_8_3').val();
$('#input_8_3').val(text+oldtext);
});
})(jQuery);
(function($){
$('div.thumbn').click(function() {
$(this).removeClass('chosen-img');
});
})(jQuery);
(function($){
$('.thumbn').click(function() {
$(this).addClass('chosen-img');
});
})(jQuery);
.thumbn {
width: 85px;
height: 85px;
background: #7ef369;
float: left;
margin: 10px;
}
.chosen-img.thumbn{background:#727272}
input{width:100%}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<input type="text" id="input_8_3" readonly="" value="3014,3015,3016,3017,3018" class="form-control data_lable">
<input type="text" id="input_8_4" readonly="" value="" class="form-control data_lable">
<div class="user-profile-avatar user_seting st_edit">
<div>
<div class="thumbn" id="img-act-3014"></div>
<div class="thumbn" id="img-act-3015"></div>
<div class="thumbn" id="img-act-3016"></div>
<div class="thumbn" id="img-act-3017"></div>
<div class="thumbn" id="img-act-3018"></div>
</div>
</div>
EDIT: I changed value of input_8_3. All the numbers in img-act-**** and values in input_8_3 are the same on load.
I've made a JS of it working.
https://jsfiddle.net/jatwm8sL/6/
I've added these:
var array = [3008,3009,3010,3011,3012];
$("#input_8_3").val(array.join());
and changed your click functions to this
var array = [3008,3009,3010,3011,3012];
var array1 = [];
$("#input_8_3").val(array.join());
(function($){
$('div.thumbn').click(function() {
var text = $(this).attr("id").replace('img-act-','');
var oldtext = $('#input_8_3').val();
if ($(this).hasClass('chosen-img'))
{
$('#input_8_3').val(text+oldtext);
var index = array.indexOf(text);
if (index !== -1)
{
array.splice(index, 1);
}
array1.push(text);
$(this).removeClass('chosen-img');
}
else
{
array.push(text);
var index = array1.indexOf(text);
if (index !== -1)
{
array1.splice(index, 1);
}
$(this).addClass('chosen-img');
}
$("#input_8_3").val(array.join());
$("#input_8_4").val(array1.join());
console.log(array1);
});
})(jQuery);
Basically, you need to check if it has a class and then remove if it has and add it if it doesn't.
Also, it's better to use a javascript array than to play around with html values as you change javascript arrays while HTML should really just display them.
If anything is unclear, let me know and I'll try to explain myself better
var transformNumbers = (function () {
var numerals = {
persian: ["۰", "۱", "۲", "۳", "۴", "۵", "۶", "۷", "۸", "۹"],
arabic: ["٠", "١", "٢", "٣", "٤", "٥", "٦", "٧", "٨", "٩"]
};
function fromEnglish(str, lang) {
var i, len = str.length, result = "";
for (i = 0; i < len; i++)
result += numerals[lang][str[i]];
return result;
}
return {
toNormal: function (str) {
var num, i, len = str.length, result = "";
for (i = 0; i < len; i++) {
num = numerals["persian"].indexOf(str[i]);
num = num != -1 ? num : numerals["arabic"].indexOf(str[i]);
if (num == -1) num = str[i];
result += num;
}
return result;
},
toPersian: function (str, lang) {
return fromEnglish(str, "persian");
},
toArabic: function (str) {
return fromEnglish(str, "arabic");
}
}
})();
document.getElementById('ApproximateValue').addEventListener('input', event =>
event.target.value = TolocalInt(event.target.value)
);
function TolocalInt(value)
{
if ((value.replace(/,/g, '')).length >= 9) {
value = value.replace(/,/g, '').substring(0, 9);
}
var hasZero = false;
var value = transformNumbers.toNormal(value);
var result = (parseInt(value.replace(/[^\d]+/gi, '')) || 0);
if (hasZero) {
result = '0' + (result.toString());
}
return result.toLocaleString('en-US');
}
<input id="ApproximateValue" name="ApproximateValue" type="text" maxlength="12" />
I have five form fields that will initially NOT be pre-populated with any values.
If a user fills out one of the fields, the next time they visit the form that field will be pre-populated with the value from the previous visit.
Here's what I'm trying: I'd like to create a loop that iterates through the fields. It will always check to see if there are empty fields. After finding 2 empty fields, the loop will stop and only show those 2 empty fields, while the other fields are hidden.
Here's what I have so far...I just can't figure how to stop after iterating through two fields,
HTML:
<form action="">
<input id="first" type="text" value="" />
<input id="second" type="text" value="" />
<input id="third" type="text" value="" />
<input id="fourth" type="text" value="" />
<input id="fifth" type="text" value="" />
</form>
JS:
$(document).ready(function() {
$('input').hide();
var firstValue = $('input[id="first"]').val(),
secondValue = $('input[id="second"]').val(),
thirdValue = $('input[id="third"]').val(),
fourthValue = $('input[id="fourth"]').val(),
fifthValue = $('input[id="fifth"]').val();
var firstField = $('input[id="first"]'),
secondField = $('input[id="second"]'),
thirdField = $('input[id="third"]'),
fourthField = $('input[id="fourth"]'),
fifthField = $('input[id="fifth"]');
var formValues = [firstValue, secondValue, thirdValue, fourthValue, fifthValue];
var fieldIds = [firstField, secondField, thirdField, fourthField, fifthField];
for (var i = 0; i < fieldIds.length; i++) {
for (var i = 0; i < formValues.length; i++) {
if ( formValues[i] === '' ) {
fieldIds[i].show();
return false;
}
}
}
});
Take all input fields, take the first two empty fields and show them; finally, take the complement of that to hide the rest:
var $inputFields = $('form input:text'),
$emptyFields = $inputFields
.filter(function() { return this.value == ''; })
.slice(0, 2)
.show();
$inputFields
.not($emptyFields)
.hide();
Demo
$(document).ready(function() {
$('input').hide().each( function(){
var index=0; //initilialize the counter
if( $(this).val().length ){ //check for input's length
if(index < 2) {
$(this).show();
index=index+1 //or index++ if you like
}
else {
break;
}
}
}
)};
If you want to include select and textarea fields in your eligible input population, use $(':input').hide().each(...). If you have multiple forms on your page, you would want to include that in your selector, too: $('#intended_form').find(':input').hide().each(...).
http://api.jquery.com/each/
I think that Jack provides the best answer, but this should work too. here, i use a second counter j and break the loop when j % 2 == 0, so at this time its found two empty fields. this is known as a modulus or the modulo operator.
$(document).ready(function() {
$('input').hide();
var firstValue = $('input[id="first"]').val(),
secondValue = $('input[id="second"]').val(),
thirdValue = $('input[id="third"]').val(),
fourthValue = $('input[id="fourth"]').val(),
fifthValue = $('input[id="fifth"]').val();
var firstField = $('input[id="first"]'),
secondField = $('input[id="second"]'),
thirdField = $('input[id="third"]'),
fourthField = $('input[id="fourth"]'),
fifthField = $('input[id="fifth"]');
var formValues = [firstValue, secondValue, thirdValue, fourthValue, fifthValue];
var fieldIds = [firstField, secondField, thirdField, fourthField, fifthField];
var j = 0;
for (var i = 1; i < fieldIds.length; i++) {
if ( formValues[i] === '' ) {
fieldIds[i].show();
j++;//we found an empty field
if (j % 2 == 0)
{
break;
}
}
}
});
I am trying to setup a small article chooser. While it works in Firefox and Chrome, as well as IE7, it has problems on IE8 and IE9.
In IE 8 and 9 it changes to "increase" field to "NaN" when clicked. (edit: solved by placing a letter in front of the number)
In IE9 it updates the "Warenkorb", but places "NaN" or "\/" in
the field for "Anzahl". (edit: solved by placing a letter in front of the number)
In IE8 it completely ignores the update function. (edit: is related to the innerHTML-Bug)
To me it seems that somehow I can not reach the form itself. I have already tried to use document.forms[0] and document.getElementById["bestmult"] instead, in case the delivered object is not the field inside the form, but that did not change anything.
I feel like the solution is very simple, but I just can not put my finger on it.
Here is the code:
<script>
var sumarray = new Array();
var artarray = new Array();
var costarray = new Array();
var counter=0;
function increase(obj, field, type){
var form = obj.form;
var value = parseInt(form.elements[field].value, 10);
value++;
form.elements[field].value = value;
updateCosts(obj, field, type);
}
function decrease(obj, field, type){
var form = obj.form;
var value = parseInt(form.elements[field].value, 10);
if(value > 0){
value--;
form.elements[field].value = value;
updateCosts(obj, field, type);
}
}
function updateCosts(obj, field, type){
var form = obj.form;
var exist = artarray.indexOf(form.elements[field].name);
var preis = 0;
if (type == 'b'){
preis = 19.95;
}else if (type == 'p') {
preis = 29.95;
}
if (exist != -1){
if (form.elements[field].value == 0){
sumarray.splice(exist , 1);
artarray.splice(exist , 1);
costarray.splice(exist , 1);
counter--;
}else {
sumarray[exist] = form.elements[field].value;
artarray[exist] = form.elements[field].name;
costarray[exist] = preis;
}
}else {
sumarray[counter] = form.elements[field].value;
artarray[counter] = form.elements[field].name;
costarray[counter] = preis;
counter++;
}
var completestring = "";
if (counter > 0) {
var product = 0;
completestring += "<h1>Warenkorb</h1><table border=0><tr style='background:gray;' align='center'><td width=110 align='center'>Artikel</td><td width=80>Anzahl</td><td align='center' width=60>Preis</td><td align='center' width='40'>Del</td></tr>";
for(var i=0;i<counter;i++){
completestring += "<tr><td>"+artarray[i].replace("_", " ")+"</td><td align=center>"+sumarray[i]+"</td><td align=center>"+costarray[i]+"</td><td align=center><img src='img/trash.png' onclick='setZero(\""+artarray[i]+"\")'></td></tr>";
product += parseInt(sumarray[i])*parseInt(costarray[i]);
}
completestring += "</table><h2>"+(product).toFixed(2)+"</h2>";
} else {
completestring += "<h1>Warenkorb</h1>";
}
document.getElementById("sum").innerHTML = completestring;
}
function setZero(element) {
var form = document.forms[0];
form.elements[element].value = "0";
var obj = form.elements[element];
updateCosts(obj, element, "b");
}
</script>
<div id="sum">
</div>
<form id="bestmult" action="test2.html" method="post">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td rowspan="2"><input type="text" name="1_Basis" value="0" onblur="updateCosts(this, '1_Basis', 'b')" /></td>
<td><input type="button" value=" /\ " onclick="increase(this, '1_Basis', 'b')" class="button" ></td>
</tr><tr>
<td><input type="button" value=" \/ " onclick="decrease(this, '1_Basis', 'b')" class="button" ></td>
</tr>
</table>
This code is of cause not everything there is (although everything that could potentially influence the problem at hand), so don't bother with the script tags, or the incomplete form, these where just added for completion, to show how it all fits together without having to post the whole code.
edit: it seems that IE8 and 9 have a problem with the way I named by textfields. I could resolve most of the problem by simply putting a z at the start which I can later simply strip to regain to proper text. Now it is just IE8 that does not seem to like innerHTML. I did find a lot on this on the Internet, yet nothing that really works.
Check my modifications in your script code
<script>
var sumarray = new Array();
var artarray = new String();
var costarray = new Array();
var counter=0;
function increase(obj, field, type){
var form1 = obj.form;
//alert(obj.form1.elements[0].value);
var value = parseInt(form1.elements(field).value, 10);
value++;
form1.elements(field).value = value;
updateCosts(obj, field, type);
}
function decrease(obj, field, type){
var form = obj.form;
var value = parseInt(form.elements(field).value, 10);
if(value > 0){
value--;
form.elements(field).value = value;
updateCosts(obj, field, type);
}
}
function updateCosts(obj, field, type){
var form = obj.form;
var exist = artarray.indexOf(form.elements(field).name);
var preis = 0;
if (type == 'b'){
preis = 19.95;
}else if (type == 'p') {
preis = 29.95;
}
if (exist != -1){
if (form.elements(field).value == 0){
sumarray.splice(exist , 1);
artarray.splice(exist , 1);
costarray.splice(exist , 1);
counter--;
}else {
sumarray[exist] = form.elements(field).value;
artarray[exist] = form.elements(field).name;
costarray[exist] = preis;
}
}else {
sumarray[counter] = form.elements(field).value;
artarray[counter] = form.elements(field).name;
costarray[counter] = preis;
counter++;
}
var completestring = "";
if (counter > 0) {
var product = 0;
completestring += "<h1>Warenkorb</h1><table border=0><tr style='background:gray;' align='center'><td width=110 align='center'>Artikel</td><td width=80>Anzahl</td><td align='center' width=60>Preis</td><td align='center' width='40'>Del</td></tr>";
for(var i=0;i<counter;i++){
completestring += "<tr><td>"+artarray[i].replace("_", " ")+"</td><td align=center>"+sumarray[i]+"</td><td align=center>"+costarray[i]+"</td><td align=center><img src='img/trash.png' onclick='setZero(\""+artarray[i]+"\")'></td></tr>";
product += parseInt(sumarray[i])*parseInt(costarray[i]);
}
completestring += "</table><h2>"+(product).toFixed(2)+"</h2>";
} else {
completestring += "<h1>Warenkorb</h1>";
}
document.getElementById("sum").innerHTML = completestring;
}
function setZero(element) {
var form = document.forms[0];
form.elements[element].value = "0";
var obj = form.elements[element];
updateCosts(obj, element, "b");
}
</script>
For ie8 indexOf() method for Array will give error. Check this
I think the problem is related to passing "this" to the function. It seems to be passing the button.
Try replacing
var form = obj.form;
with
var form=document.forms[0]
and ignore the reference to "obj"
Ok, so here is the solution packed together into one answer:
I was facing two problems:
the first one was, that an attribute name in XML can not start with a Number. I solved this by simply adding a letter in front, which i could delete for the String lateron using the replace-function.
The second problem was that the IE8 does not have the Array function indexOf(). Thank you 555k for your help here, you gave me the final piece to the puzzle. I wrote a small workaround, that suits my situation:
var exist = -1;
var needle = form.elements[field].name;
for (var i=0;i<counter;i++){
if (artarray[i].indexOf(needle) != -1){
exist = i;
}
}
This does exactly what I want, so it works for my problem. It is, of cause, not a solution to the problem of a nonexistant "indexOf()" for an aged browser, but maybe someone can use this.