rem: if (element._overflow) return; 
add: if (element._overflow) return element; 
context:   makeClipping: function(element) {    element = $(element);    if (element._overflow) return;    element._overflow = element.style.overflow || 'auto';    if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')      element.style.overflow = 'hidden';    return element;  },
meta: 7994	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/7994/e4fbd7ea1ad67665241c7a4b0836d999119110a3/prototype.js/buggy/lib/prototype.js