Javascript to Check if field has special characters.

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Hi,

I have a field nick i want to set some condition using javascript like the ones at the end of the post
what i want is javascript to Check if field nick has special characters like for example this sample "<" how do i do that

if (nick.value.length == 0)
{
    alert("wrong name");
    nick.focus();
    return;
}
if (nick.value.length >= 50)
{
    alert("wrong name");
    nick.focus();
    return;
}

Regards

Posted 1-Aug-11 1:18am

akoyoon

Updated 1-Aug-11 1:30am

RaisKazi

v2

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Comments

Herman<T>.Instance 1-Aug-11 7:21am

use regular expressions

1 solution

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Shameel · Accepted Answer · 2011-08-01T01:30:00

Solution 1

You can use something like this:

JavaScript

var splChars = "*|,\":<>[]{}`\';()@&$#%";
for (var i = 0; i < nick.value.length; i++) {
    if (splChars.indexOf(nick.value.charAt(i)) != -1){
    alert ("Illegal characters detected!"); 
    nick.focus(); 
}

Posted 1-Aug-11 1:30am

Shameel

Comments

akoyoon 1-Aug-11 7:36am

can you explain to me the code and how it work

[no name] 1-Aug-11 8:01am

if you have a little knowledge of JavaScript, you should be able to figure it out yourself.