function createRequest(){
	var xmlHttp;
	try{
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
		return xmlHttp;
	}catch (e){
		// Internet Explorer
		var aVersions = [ "MSXML2.XMLHttp.5.0",
        "MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0",
        "MSXML2.XMLHttp","Microsoft.XMLHttp"
      ];

      for (var i = 0; i < aVersions.length; i++) {
        try {
            xmlHttp = new ActiveXObject(aVersions[i]);
            return xmlHttp;
        } catch (oError) {
            //Do nothing
        }
	  }

	}

}