add: this.options.isSuccess = this.options.isSuccess || this.isSuccess; 
context: 	initialize: function(options){		this.transport = window.XMLHttpRequest ? new XMLHttpRequest() : (window.ie ? new ActiveXObject('Microsoft.XMLHTTP') : false);		this.setOptions(this.options, options);		if (!this.transport) return;		this.headers = {};		if (this.options.initialize) this.options.initialize.call(this);	},
meta: 7826	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/7826/1ae6d327a1a38d7f6c322d37020f13d630c9e787/XHR.js/clean/Remote/XHR.js