rem: return Selector.findElement($(element).descendants(), expression, index); 
add: element = $(element); if (arguments.length == 1) return element.firstDescendant(); var descendants = element.descendants(); return expression ? Selector.findElement(descendants, expression, index) : descendants[index || 0]; 
context:   down: function(element, expression, index) {    return Selector.findElement($(element).descendants(), expression, index);  },
meta: 7608	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7608/d556a0875c83645645bd2067594241546d26d052/prototype.js/buggy/web/js/prototype.js