Validating Text Field for Only Numbers

Number Only Text Field

The below function for allowing only numbers to text field is written in Javascript. The function is used in most of the cases when validating text field for numbers

Javascript Code for Validating Text Field for Only Numbers

function onlyNumbers(evt) {
var e = evt
if(window.event){ // IE
var charCode = e.keyCode;
} else if (e.which) { // Safari 4, Firefox 3.0.4 and later versions
var charCode = e.which
if (charCode > 31 && (charCode < 48 || charCode > 57))
return false;
return true;

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