jQuery: Enable placeholder attribute in old browsers

gistfile1

$(function(){
  var d = "placeholder" in document.createElement("input");
  if (!d){
	  $("input[placeholder]").each(function(){
		  $(this).val(element.attr("placeholder")).addClass('placeholder');
	  }).bind('focus',function(){
		  if ($(this).val() == element.attr('placeholder')){
			  $(this).val('').removeClass('placeholder');
		  }
	  }).bind('blur',function(){
		  if ($(this).val() == ''){
			  $(this).val(element.attr("placeholder")).addClass('placeholder');
		  }
	  });
  }
});