Validate input field - must be only digits

[romsok]

Hi,

How can I validate a text field to make sure it contains only digits?

Thanks,

[mrhoo]

field={value:'12e'}
isdigits=parseInt(field.value)+''===field.value;
alert(isdigits)

[harrierdh]

<script language="javascript" type="text/javascript">
	function isNumeric(sText, decimalAllowed) {
		if (sText.length == 0) return false;
		var validChars = "";
		if (decimalAllowed) {
			validChars = "0123456789.";
		} else {
			validChars = "0123456789";
		}
		var isNumber = true;
		var charA;
		var decimalCount = 0;
		for (i = 0; i < sText.length && isNumber == true && decimalCount < 2; i++) {
			charA = sText.charAt(i); 
			if (charA == ".") { 
				decimalCount += 1;
			}
			if (validChars.indexOf(charA) == -1) {
			isNumber = false;
			}
		}
		return isNumber;
	}
</script>

[philmee95]

<script type="text/javascript" src="js/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="js/jquery.validate.js"></script>
<script type="text/javascript">
$(document).ready(function(){
	$("#myform").validate({
	  rules: {
		mydigitfield: {
		  required: true,
		  digits: true
		}
	  }
	  , messages: { 
		   mydigitfield: {
			   digits: 'Digits only there bud'
		   }    
		}
	});
});
</script>
<form name="myform" id="myform" method="post">
<input type="text" name="mydigitfield" id="mydigitfield" />
<input type="submit" />
</form>

mostly from http://docs.jquery.com/Plugins/Valid...Methods/digits

[Lazer]

Hi
The most EASY way is: NaN or isNaN()
which is Not A Number
http://www.w3schools.com/jsref/jsref_nan.asp

Good Luck!
E.c
http://funny-video.tv