rem: if(el.readAttribute('alt')) 
add: if(Element.readAttribute(el, 'alt')) 
context: 		this.el.descendants().each(function(el){			if(el.readAttribute('alt'))				el.alt = "";		});
meta: 2671	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2671/e1164effff01f188beca2d71efc669ab84b506e0/tooltips.js/clean/tooltips.js