Filter Alphanumeric in Input with Jquery

Jquery is very handy to catch un-wanted input character from our input form. to make this happend, use this code :

$('input').bind('keypress', function (event) {
 var regex = new RegExp("^[a-zA-Z0-9]+$");
 var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
 if (!regex.test(key)) {
 event.preventDefault();
 return false;
 }
 });

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