$(document).ready(function(){
	$(".phone_num").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();
		  }
		});
	$(".phone_num").bind("change keyup blur focus", function() {
		//alert($(".phone_num").val().length);
		if($(".phone_num").val().length==8){
			$("#submitbutton").attr("disabled", false);
			$("#submitbutton").removeClass("button_disabled");
		}else{
			$("#submitbutton").attr("disabled", true);
			$("#submitbutton").addClass("button_disabled");
		}
	});
	
});