I am trying to make a simple trim function but this doesnt works.
function tr(input){
var i;
var str;
for(i=0; i<input.length-1; i++){
if(text.charAt(i)==" "){
str+=""+text.charAt(i)
} return str
}}
I want to write a function that appends a text string to my div. It seems pretty straight forward and I can't figure out why this doesn't work.
<html>
<head>
<script type="text/javascript">
[code]....
Using Regular Expressions (JavaScript 1.2/JScript 4+) :
String.prototype.lTrim =
function()
{
return this.replace(/^s+/,'');
}
String.prototype.lTrim =
function()
{
return this.replace(/s+$/,'');
}
String.prototype.trim =
function()
{
return this.replace(/^s+|s+$/g,'');
}
or for all versions (trims characters ASCII<32 not true
"whitespace"):
function LTrim(str) {
for (var k=0; k<str.length && str.charAt(k)<=" " ; k++) ;
return str.substring(k,str.length);
}
function RTrim(str) {
for (var j=str.length-1; j>=0 && str.charAt(j)<=" " ; j--) ;
return str.substring(0,j+1);
}
function Trim(str) {
return LTrim(RTrim(str));
}
http://msdn.microsoft.com/library/d...363906a7353.asp
http://docs.sun.com/source/816-6408-10/regexp.htm
Does java script provides inbuilt trimming function, if not then what
is the solution.
Is there really no string trim function in JS?
Code:
function trim(s)
{
return rtrim(ltrim(s));
[code].....
My trim() function seems to halt JavaScript execution in Chrome.
Code:
function trim(s) {
s = s.replace(/(^s*)|(s*$)/gi,"");
s = s.replace(/[ ]{2,}/gi," ");
[code]...
It works in IE and firefox.. no it doesn't.
I can't get GetElementsByClassName to work.Clicking on the first button moves data to a second function that when clicked moves the data to the input field.This codes works when I change getElementsByName('pics')to getElementById('upload').But I need it to work with getElementsByName().
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>[code]....
The following script works fine in IE6. In FF 1.0.7, it doesn't display the response text. The alert()'s in the script show that:
1) the script successfully creates the request object
2) 'http_request.status' starts off equal to 0
3) the readystate displays: 1, 1, 2, 4
4) an error occurs when the script tries to access the .status property of the request object after the request has been sent and the readyState reaches 4(line marked in red below).
<html>
<head><title></title>
<script type="text/javascript" language="javascript">
function makeRequest(url)
{
var http_request = false;
if (window.XMLHttpRequest)
{ // Mozilla, Safari,...
http_request = new XMLHttpRequest();
alert(http_request); //object XMLHttpRequest
alert("status: " + http_request.status); //status: 0
/*
alert("overriding mime type");
http_request.overrideMimeType('text/xml');
*/
}
else if (window.ActiveXObject)
{ // IE
try
{
http_request = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
http_request = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e) {}
}
}
if (!http_request)
{
alert('Giving up :( Cannot create an XMLHTTP instance');
return false;
}
http_request.onreadystatechange = function() { alertContents(http_request); };
http_request.open('GET', url, true);
http_request.send(null);
}
function alertContents(http_request)
{
alert(http_request.readyState);
if (http_request.readyState == 4)
{
ERROR ---> if(http_request.status) alert("status property exists");
else alert("no status property");
if (http_request.status == "200")
{
alert(http_request.responseText);
}
else
{
alert('There was a problem with the request.');
}
}
}
</script>
</head>
<body>
<div><a href="" onclick="makeRequest('someText.txt')">click me</a></div>
</body>
</html>
I'm having some trouble trying to get a simple GET to work.
I have a page called 1.php with the following code:
This all works fine when I link directly to the page (I.e [url]), however when I load this page through jquery (so the url becomes [url]) the GET functionality stops working.
I've tried to address this issue multiple times, and yet IE 8 simply ignores it. I know jquery has the capability of operating correctly with other examples, but the below code just doesn't seem to satisfy it.[code]
View 4 Replies View RelatedHow do I change a id attribute of a div? I would like to change the id of the nested div from a to b.
[Code]...
I spent 2 hours trying everything, but I still can't get it to work.
<html>
<head>
<title>Hi</title>
<script type="javascript">
var outcome1 = form.YesNo.value
if (outcome1 == no) {
var formResult = no
}
else {
[code]....
I have an input for Fahrenheit in degrees, then a button to start the calculations, then an input box for the result. But the result stays empty. where my Javascript code went wrong? I am modifying someone else's code form the Internet,I am guessing at how it works. [code]
View 4 Replies View RelatedI need a button that will switch on a div and the toggle between this div (link) and other one. I used jquery-latest.js:
<div id="button1"><button>Choice</button></div>
<div class="gal"><a href="1.html">1</a></div>
<div class="gal" style="display: none"><a href="2.html">2</a></div>
[code]....
Why won't this work?
Nothing pops up for the alert.
<script type="text/javascript">
How to union all plugins in 1 file ? Simple copy-paste do not work.
View 1 Replies View RelatedCan this be refined further to be more efficient?
function shout()
{
if (isNaN(document.form1.entry.value)==true) {
alert("please only enter numbers for an answer")}
else
{
alert("the new number is: "+(+document.form1.entry.value+5))}
}
also what would be the correct structure as to make the script more legible
to regular and proficient writers of JS?
I'm trying to write a function that does a simple math function between some textfields.
There are 4 variables : Unit price, Discount, Quantity and Total
Unit price is a fixed variable.
Discount, Quantity and Total depend on the fixed variable and also on the values of eachother. (ie : if qty=2 then total=2xUnit Price) etc...
I want to be able to show the changing values in real time.
So if I have 3 textfields and I change qty, I want it to update Total based on the discount and the qty. If I update discount, I want to update Total based on qty and discount.
I'm guessing I would have to write three functions and call each one from their respective textfields.
How to write a function, and call it so that passes the unit price to the funtion, gets the values of all of the textfields and then changes them all to their new values?
I have a simple function defined on my page in the script section that should put me in a div named "apDiv4" a text when i press the down arrow in a text input called 'search2'. But it does nothing.
Here's the function:
And here is where i call it:
Why this doesn't work? I've tried onkeydown= "KeyCheck()" too.
I need to create a simple calculator in Java. Below is what I have so far; it is not working currently and I'm not sure why. I also needed to add the parseInt function somewhere in the code but I'm not sure where.
import java.util.Scanner;
public class CalcDemo {
public static void main(String[] args){
}
private int valueA;
private int valueB;
private String operator;
private char operatorA;
public int getvalueA() {
return valueA;
} .....
I am a Javascript newbie and I'm trying to implement a very simple form validation function, but for some reason it won't work. I must be doing something fundamentally wrong here. Maybe somebody can hint me into the right direction? My code looks like so:
function validate_form ()
{
valid = true;
var re = new RegExp();
re.compile("[A-Za-z0-9._-]+@[^.]+..+");
if ((document.form.author_name.value == "")
|| (document.form.author_email.value == "")
|| (!re.test(document.form.author_email.value))
|| (document.form.author_message.value == ""))
{
alert ("Please fill in all required fields.");
valid = false;
}
return valid;
}
The tricky bit is the email validation using the regular expression. Apart from that it all works.
Don Gosselin's JavaScript Fourth Edition is a tiresome read and I have been unable to put together the necessary tools that Don teaches to find the answers that I want to make the following function work.
function calculate()
var shipping = 0;
var total = 0; {
if (document.forms[0].hand_tool.value != document.forms[0].hand_tool.value == true)
(document.forms[0]item1.value == 20); {
[Code]...
I am doing a simple slidetoggle with a click function. Meaning I am basically sliding a div (content) into nothing with another div (button) using a click event. This works all fine and dandy but now here is the problem.. I want to change the class of the div(button) so that I may show a different background image depending on the state of the open or closed content div.
Here is the code so far...
$(document).ready(function() {
$('.Button').click(function() {
$('.Content').slideToggle('normal');
if($(this).next().is(':hidden') == false) {
$(this).addClass('off');
alert ('You should see See More button.');
}});
Then obviously I have CSS that has the classes I need including an "on" class that I could not get to fire.
I am trying to write a simple javascript function that locates a parameter in a url, if it is present, and replace it with a different value. Here's my code:
function setParam(url,param,value) {
var a = '&'+param+'=d+';
var new_url = url.replace(new RegExp(a), '');
new_url = new_url + '&'+param+'='+value;
return new_url;
}
The problem is, it doesn't work. It adds the new param, value pair to the old url, but the old param isn't replaced. What do I need to do here to make this work?
I am trying to do a simple echo onclick, but despite what I try to do, it shows no errors, but won't work. I've tried things like:
echo "<div onclick="alert('test');">t</div>";
echo '<div onclick="alert('test');">t</div>';
But just can't seem to get it to work right. I'm trying to do this on a script that is being eval on the ajax request. Thus I'm having problems placing the ',", marks.
As part of a school project I had the main body of text at 11px, some people could read it, some couldn't, and so I created a zoom function. Unlike the normal zoom functions in JS or the browser's own zoom, which increase the size of everything thus throwing some areas out of proportion, mine only increases the size of the main body of text.
(using php tags to get code highlighting)
<table>
<tr><script type="text/javascript">
var px = new Array(11,12,13,14,15,16,17,18,19,20,21,22,23); // insert your own numbers here, these are the font sizes - goes as higher or as low as you want. If the number is less than the original font size you have yourself a zoom-out function too.
var size = 0;
function do_change_down(elemID) {
if (size > 0) {
size--
document.getElementById(elemID).style.fontSize = px[size]
}
}
function do_change_up(elemID) {
if (size < 12) { // number is how many elements in the px array. if there are more elements in the array, it will not use them all, it'll stop at that number, so make sure you increment it when you add more to the array.
size++
document.getElementById(elemID).style.fontSize = px[size]
}
}
</script>
<td>
<label for="zoom">Change font size: </label><a href="javascript:do_change_down('text')" id="zoom" name="zoom">-</a> <a href="javascript:do_change_up('text')" name="zoom" id="zoom">+</a>
</td>
</tr>
</table>
in this instance I have the main content area with the id="text" - change the do_change_down('your_element_id'); and same for do_change_up accordingly to the text you want to be 'zoomed' in on..
As it says in the title, this is a very simple function but is also very effective.