rem: this.headers[header] = value; 
add: this.headers[header] = value; 
context: 		setRequestHeader: function(header, value){		  this.headers[header] = value;		},
meta: 2798	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/2798/de71a046e619884292b122ddcf1401ad9932a5c7/env.js/clean/build/runtest/env.js