Deal with placeholder without browser support

placeholder_fix.js

function elementSupportsAttribute(element, attribute) {
  var test = document.createElement(element);
  if (attribute in test) {
    return true;
  } else {
    return false;
  }
};

$(document).ready(function(){
	if (!elementSupportsAttribute('input', 'placeholder')) {
		$("input[placeholder], textarea[placeholder]").each(function(ind, ele){
			$el = $(this);
			if($el.val() == '') {
				$el.val($el.attr('placeholder') || '');
			}
		});

		$("input[placeholder], textarea[placeholder]")
		.focus(function() {
			var $el = $(this);
			if ($el.val() == $el.attr("placeholder")) {
				$el.val('');
			}
		})
		.blur(function() {
			var $el = $(this);
			if ($el.val() == '') {
				$el.val($el.attr("placeholder"));
			}
		});
	}
});