rem: if (element._overflow) return; element.style.overflow = element._overflow; element._overflow = undefined; 
add: if (!element._overflow) return element; element.style.overflow = element._overflow == 'auto' ? '' : element._overflow; element._overflow = null; return element; 
context:   undoClipping: function(element) {    element = $(element);    if (element._overflow) return;    element.style.overflow = element._overflow;    element._overflow = undefined;  }
meta: 2801	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/2801/7e143d2df37946a5416f0f043869478087652eb6/prototype.js/clean/examples/testcases/prototype.js