rem: var evt = evt?evt:window.event?window.event:null; if(!evt) return; 
add: evt = evt?evt:window.event?window.event:null; if(!evt) return false; 
context: function zoom_mouseup(evt) {	 var evt = evt?evt:window.event?window.event:null; 	 if(!evt) return;	 //only left button	 if(evt.button != 0) return;	if(zoom_status == 0) {       		zoom_on(evt);		return false;		}	 else if(zoom_status == 1) {		zoom_status = 2;		return false;	 }	 else if(zoom_status == 2) {	 	zoom_off(); 		return false;	 }}
meta: 10854	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10854/deebc41d1670f37a95418153fabf2bb653b4a389/proofread.js/buggy/proofread.js