///////////////////////////////////////////////
//////Auho ivan
//////Time 2006-08-29
//////Function search
///////////////////////////////////////////////
   var http_request = false;
    function search_key(url,backfunction) {
        http_request = false;
        if (window.XMLHttpRequest) { // Mozilla, Safari,...
            http_request = new XMLHttpRequest();
            if (http_request.overrideMimeType) {
                http_request.overrideMimeType('text/xml');
            }
        } else if (window.ActiveXObject) { // IE
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }

        if (!http_request) {
            alert('Error :( Cannot create an XMLHTTP instance');
            return false;
        }
        http_request.onreadystatechange = backfunction;
        http_request.open('GET', url, true);
		//定义传输的文件HTTP头信息
　		http_request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
        http_request.send(null);
 

    }