Firefox CNO issue.

by Ketan Patel

HTML

<input id="cno" maxlength="8" />

JavaScript

$('#cno').bind('keypress', function (event) {
		
    var nvA = $(this).val();
    var nvAL = nvA.length;
    if(nvAL<=1) {
    	var regex = new RegExp("^[a-zA-Z\b]+$");
      var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
      if (!regex.test(key)) {
         event.preventDefault();
         return false;
      }
    } else {
    	var regex = new RegExp("^[0-9\b]+$");
      var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
      if (!regex.test(key)) {
         event.preventDefault();
         return false;
      }
    }
    
    
});