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Automatically removes specified characters from input box. Good for fields that require only text/number inputs. Easily modified to accept only text or only numerals.

Label: Validation (Character)

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JavaScript
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<SCRIPT LANGUAGE="JavaScript">
// Mikhail Esteves (miks80@yahoo.com)

<!-- Begin
var mikExp = /[$\\@\\\#%\^\&\*\(\)\[\]\+\_\{\}\`\~\=\|]/;
function dodacheck(val) {
var strPass = val.value;
var strLength = strPass.length;
var lchar = val.value.charAt((strLength) - 1);
if(lchar.search(mikExp) != -1) {
var tst = val.value.substring(0, (strLength) - 1);
val.value = tst;
   }
}
function doanothercheck(form) {
if(form.value.length < 1) {
alert("Please enter something.");
return false;
}
if(form.value.search(mikExp) == -1) {
alert("Correct Input");
return false;
}
else {
alert("Sorry, but the following characters\n\r\n\r@ $ % ^ & * # ( ) [ ] \\ { + } ` ~ =  | \n\r\n\rare not allowed!\n");
form.select();
form.focus();
return false;
}
alert("Correct Input");
return false;
}
//  End -->
</script>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->

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<form name=xyz onSubmit="return doanothercheck(this.txtTerm);">
<input type="text" name="txtTerm" size="35" maxlength="50" value="" onKeyUp="javascript:dodacheck(xyz.txtTerm);">
<br>
<input type=submit value=Check>
</form>
	<!--
    	This script downloaded from www.JavaScriptBank.com
    	Come to view and download over 2000+ free javascript at www.JavaScriptBank.com
	-->

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30/01/2007
Mikhail Esteves [more]
10,086
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JavaScript Validation (Character)

5/5 1 votes / 10,086 previews / 1 comment 30/01/2007 Automatically removes specified characters from input box. Good for fields that require ...JavaScript Validation (Character) - Validation (Character)

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Label: Validation (Character)