function GetObj(objName)
{
    if(document.getElementById){
				return eval('document.getElementById("' + objName + '")');
			}else if(document.layers){
				return eval("document.layers['" + objName +"']");
			}else{
				return eval('document.all.' + objName);
			}
		} 

function bookmarkit()
{
   window.external.addFavorite('http://www.gxnizi.com','广西腻子行业门户网');
}
    
    //AJAX
var xmlHttp1;
var tmp_name;
var codeNumber;

function createValidCode()
{
    var rand=String(parseInt(Math.random()*10000)); 
	if(rand.length<4)
	{
		rand=String(parseInt(Math.random()*10000)); 
	}
	codeNumber=rand
	GetObj("imgvalimg0").src="/img/"+ rand.substring(0,1) +".jpg";
	GetObj("imgvalimg1").src="/img/"+ rand.substring(1,2) +".jpg";
	GetObj("imgvalimg2").src="/img/"+ rand.substring(2,3) +".jpg";
	GetObj("imgvalimg3").src="/img/"+ rand.substring(3,4) +".jpg";
}

function createxmlHttpRequest() {
	if (window.ActiveXObject) {
		xmlHttp1 = new ActiveXObject("Microsoft.xmlHttp");
	}
	else if (window.xmlHttpRequest) {
		xmlHttp1 = new xmlHttpRequest();
	}
}

function startRequest() {
    if(GetObj("username1").value.length==0 || GetObj("password1").value.length==0 || GetObj("txt_valid").value.length==0)
    {
        alert("请先填写完登录信息！");
    }
    else
    {
        if(GetObj("txt_valid").value==codeNumber)
        {
            tmp_name=GetObj("username1").value;
	        createxmlHttpRequest();
	        xmlHttp1.onreadystatechange = handleStateChange;
	        var url = "/www/Login/Login_check.asp?sta=login&username="+encodeURI(GetObj("username1").value)+"&password="+encodeURI(GetObj("password1").value)+"&timeStamp="+new Date().getTime();
	        xmlHttp1.open("GET",url,true);
	        xmlHttp1.send(null);
	    }
	    else
	    {
	        alert("验证码输入错误！");
	    }
	}
}

function getCheck()
{
    createxmlHttpRequest();
	xmlHttp1.onreadystatechange = getLoginCheck;
	var url = "/checklogin.aspx?sta=session&timeStamp="+new Date().getTime();
	xmlHttp1.open("GET",url,true);
	xmlHttp1.send(null);
}

function handleStateChange() {
	if (xmlHttp1.readystate == 4) {
		if (xmlHttp1.status == 200) {
			logincheck(xmlHttp1.responseText);
		}
	}
}

function getLoginCheck() {
	if (xmlHttp1.readystate == 4) {
		if (xmlHttp1.status == 200) {
		    if(xmlHttp1.responseText!="未填")
		    {
		        successshow();
			    GetObj("td_name").value=xmlHttp1.responseText; 
			}
		}
	}
}

function logincheck(status)
{
    switch(status)
    {
        case "成功":
            successshow();
            GetObj("td_name").innerText=tmp_name;
            break;
        case "失败":
            GetObj("username1").value="";
            GetObj("password1").value="";
            alert("用户验证失败！");
            break;
        case "未填":
            alert("用户名或密码未填写！");
            break;
        case "退出":
            exitshow();
                    
    }
}


function successshow()
{
    GetObj("topRightLogin1").innerHTML="<table border='0' cellpadding='0' cellspacing='0'><tr><td>欢迎</td><td id='td_name'></td><td>访问我们的站点，您可以选择进入 [<a href='http://bbs.gxnizi.com' target='_blank'>论坛</a>] 或主站！&nbsp;&nbsp;&nbsp;&nbsp;<input type='button' class='input1' value='退出登录' onclick='javascript:exitlogin();'></td></tr></table>";
}

function exitshow()
{
    GetObj("topRightLogin1").innerHTML="用户名：<input id='username1' name='username' type='text' size='8' value='' onmouseover='this.focus()' onfocus='this.select()' onkeydown=\"javascript:if(event.keyCode==13){ GetObj('password1').focus();}\" class='input1' />";
    GetObj("topRightLogin1").innerHTML= GetObj("topRightLogin1").innerHTML+"&nbsp;&nbsp; 密码：<input name='password' id='password1' type='password' size='8' onkeydown=\"javascript:if(event.keyCode==13){ GetObj('txt_valid').focus();}\" class='input1' />&nbsp;&nbsp;验证码：<input id='txt_valid' type='text' class='input1' size='7' onkeydown=\"javascript:if(event.keyCode==13){startRequest();}\" />&nbsp;<img src='' width='15' height='15' alt='' id='imgvalimg0' /><img src='' width='15' height='15' alt='' id='imgvalimg1' /><img src='' width='15' height='15' alt='' id='imgvalimg2' /><img src='' width='15' height='15' alt='' id='imgvalimg3' />&nbsp;&nbsp;<img src='/images/butchange.gif' alt='更换' align='absmiddle' onclick='javascript:createValidCode();' /> <img alt='登录' src='/images/butlogin.gif' align='absmiddle' onclick='javascript:startRequest();' />&nbsp;&nbsp;[<a target='_blank' href='http://id.gxnizi.com'>注册</a>]";
    createValidCode();
}

function exitlogin()
{
    createxmlHttpRequest();
	xmlHttp1.onreadystatechange = handleStateChange;
	var url = "/checklogin.aspx?sta=exit&timeStamp="+new Date().getTime();
	xmlHttp1.open("GET",url,true);
	xmlHttp1.send(null);

}