return $(element).innerHTML.match(/^\s*$/); 
return $(element).innerHTML.blank(); 
  empty: function(element) {    return $(element).innerHTML.match(/^\s*$/);  },
4053	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/4053/37a06e5ed1bdb861348bb0cfd02f71470a0dfdfb/prototype.js/clean/lib/prototype.js