rem: ret = document.defaultView.getComputedStyle(this,null).getPropertyValue(prop); 
add: var c = document.defaultView.getComputedStyle(this, ''); ret = c && c.getPropertyValue(prop) || ''; 
context: 				jQuery.swap(elem, { display: 'block' }, function() {					ret = document.defaultView.getComputedStyle(this,null).getPropertyValue(prop);				});
meta: 1471	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1471/df61a63fca0bc7d1d3e3a0e7ec1e06ce2bd8fb53/jquery.js/clean/src/jquery/jquery.js