(function($){  
  $.fn.numeric = function(options) {  
           
   return this.each(function() {
   	 obj = $(this);
			obj.keypress(function(event){
				  // Backspace, tab, enter, end, home, left, right
				  // We don't support the del key in Opera because del == . == 46.
				  var controlKeys = [8, 9, 13, 35, 36, 37, 39];
				  // IE doesn't support indexOf
				  var isControlKey = controlKeys.join(",").match(new RegExp(event.which));
				  // Some browsers just don't raise events for control keys. Easy.
				  // e.g. Safari backspace.
				  if (!event.which || // Control keys in most browsers. e.g. Firefox tab is 0
				      (49 <= event.which && event.which <= 57) || // Always 1 through 9
				      (48 == event.which && $(this).attr("value")) || // No 0 first digit
				      isControlKey) { // Opera assigns values for control keys.				      						  
				    return;
				  } else {
				    event.preventDefault();
				  }
				  
			});

			   });  
  };  
})(jQuery);