var xmlHttp;
var returnMark = 3;
var m = 1;

function createXMLHttpRequest() {
    if(window.XMLHttpRequest) { 
    //alert('creating');
        xmlHttp = new XMLHttpRequest();
    } else if (window.ActiveXObject) { 
        try {
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
	        try {
	             xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	        } catch (e) {
	        }
        }
    }
}
function handleStateChange() {
    if (xmlHttp.readyState == 4) {
        if (xmlHttp.status == 200) {
            updateList();
        }
    }
         //alert(xmlHttp.status);
}
function updateList(){
	var returnText = xmlHttp.responseText;
	//alert(returnText);
	if(returnText == 0){
		returnMark = 2;
		document.getElementById("accountCheckMsg").innerHTML = "此账号不存在";	

	}else{
		document.getElementById("accountCheckMsg").innerHTML = "正确";
		document.getElementById('userID').value = xmlHttp.responseText;
		returnMark = 1;				
	}
}

function check(){
	//alert('ssssss');
	if(document.getElementById('account').value == ''){	
		document.getElementById('accountCheckMsg').innerHTML = '账号不能为空';
		return false;
	}
	
    createXMLHttpRequest();	
    m = 2;
	var account_name;
	if(getCookie('hjsm_userid')){
		var c_username;
		var p_username = decodeURIComponent(getCookie('hjsm_p_username'));
		var h_username = decodeURIComponent(getCookie('hjsm_username'));
		c_username = (p_username!='null') ? p_username : h_username;
		account_name = document.getElementById('account').value ? document.getElementById('account').value : c_username;
		
	}else{
		account_name = document.getElementById('account').value;
	}

	var URL ="../user.php?act=isuserexist&username="+encodeURIComponent(account_name);
	//var queryStr = "act=isUserExist"
	//var queryStr = "
	//alert(queryStr);
	//alert(URL);
	//alert(URL);
	xmlHttp.onreadystatechange=handleStateChange;
	xmlHttp.open("GET", URL,true);
	//xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
	document.getElementById("accountCheckMsg").innerHTML = "正在检查账号，请等待.......";	
	xmlHttp.send(null);	
	
	/**/
}