jQuery placeholder polyfill

jQuery.placeholder.polyfill.js

jQuery(document).ready(function() {
  jQuery('*[placeholder]').each(function(i, el) {
		el = jQuery(el);
		
		if(el.val() === '') {
			el.val(el.attr('placeholder'));
		}

		el.focus(function() {
			if(el.val() == el.attr('placeholder')) {
				el.val('');
			}
		});
		
		el.blur(function() {
			if(el.val() === '') {
				el.val(el.attr('placeholder'));
			}
		});
	});
});