/** 登录yido成绩系统 */
function loginYido(username, password){
    var url="http://www.h15z.net:8880/j_security_check";//alert(url);
    var params="j_username="+username+"&j_password="+password;
    yidoPostRequest(url, params);
}

function getXMLHttpRequest() {
    var xmlhttp=null;
    if(window.ActiveXObject) { // IE
        try {
            xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
            	xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    } else if (window.XMLHttpRequest) { // Mozilla, Safari,...
        xmlhttp = new XMLHttpRequest();
        if (xmlhttp.overrideMimeType) {
            xmlhttp.overrideMimeType('text/html');
        }
   }
   return xmlhttp;
}

var xmlhttp1;
function yidoPostRequest(url, parameters){
	xmlhttp1 = getXMLHttpRequest();
	if(xmlhttp1 == null){
		alert('Cannot create XMLHTTP instance');
        return ;
	}
	xmlhttp1.onreadystatechange = change_Yido_Content;
	xmlhttp1.open('POST', url);
	xmlhttp1.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	xmlhttp1.setRequestHeader("Content-length", parameters.length);
	xmlhttp1.setRequestHeader("Connection", "close");
	xmlhttp1.send(parameters);
}

function change_Yido_Content(){
	 if (xmlhttp1.readyState == 4) {
        if (xmlhttp1.status == 200) {
            var result = xmlhttp1.responseText;
        }else{
	         var result = xmlhttp1.responseText;
			 //alert('There was a problem with the request Yido.' + result);
        }
	 }
}