Check the below code which accept only alpha numeric charcater
$('input').bind('keypress', function (event) {
var regex = new RegExp("^[a-zA-Z0-9\b]+$");
var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
if (!regex.test(key)) {
event.preventDefault();
return false;
}
});
Fiddle link as:
http://jsfiddle.net/M3bvN/[
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