return $(element).innerHTML.match(/^\s*$/); 
return $(element).innerHTML.blank(); 
  empty: function(element) {    return $(element).innerHTML.match(/^\s*$/);  },
6462	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6462/110aa6ceb19f486c3930285023b66d3f23fdf6c4/prototype.js/buggy/wp-includes/js/prototype.js