rem: setRequestHeader: function(header, value){ 
add: setRequestHeader: function(/*String*/header, /*String*/value){ 
context: 	setRequestHeader: function(header, value){		this._requestHeaders[header] = value;	},
meta: 4707	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/4707/50c3492c4c3c825dbd3401e134a19ed46799c456/XhrIframeProxy.js/buggy/www/resources/dojo-ajax/src/io/XhrIframeProxy.js