rem: Element.remove(node); 
add: element.removeChild(node); node = nextNode; 
context:   cleanWhitespace: function(element) {    element = $(element);    for (var i = 0; i < element.childNodes.length; i++) {      var node = element.childNodes[i];      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))        Element.remove(node);    }    return element;  },
meta: 3768	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3768/55c6c64da0fbbfba74a0b4ad68022bf640a0a049/prototype.js/clean/actionpack/lib/action_view/helpers/javascripts/prototype.js