function G(tagid)
{
	return document.getElementById(tagid);
}
function tj()
{
	var cg = true;
	try
	{
		if(G("txtusername").value=="" || G("txtusername").value=="用户名")
		{
			G("txtusername").focus();
			throw("用户名不能为空");
		}
		if(G("txtuserpass").value=="")
		{
			G("txtuserpass").style.display="block";
			G("txtuserpass").focus();
			throw("密码不能为空");
		}
	}catch(e)
	{
		cg = false;
		alert(e);
	}
	return cg;
}
function cpass(obj)
{
	if(obj.value=="")
	{
		G("txtuserpass").style.display = "none"
		G("txtpasstip").style.display = "block"
		G("txtpasstip").value="密码";
	}
}
function epass()
{
	G("txtuserpass").style.display = "block";
	G("txtuserpass").focus();
	G("txtpasstip").style.display = "none"
}
function showad(zhi,auto)
{
	if(auto==0)
	{
		clearInterval(aplay);
		jishi = 0;
		clearInterval(hfaplay);
		hfaplay = setInterval(hfauto,1000);
	}
	cplay = zhi;
	var tagid = "pic"+zhi;
	for(i=1;i<5;i++)
	{
		G("pic"+i).style.display = "none";
		//G("lipic"+i).src = "images/indVad"+i+"_off.png";
		G("lipic"+i).className = "MM MM"+i+" Off";
	}
	G("lipic"+zhi).className = "MM MM"+zhi+" On";
	try
	{
		G(tagid).filters.alpha.opacity =0;
		G(tagid).style.display="block";	
		Calpha(tagid,100,true);
	}catch(e)
	{
		Calpha(tagid,100,true);
	}
}
//变化透明度
var topnum = 10; //一次变化多少top高度
var alphanum = 5;  //变化透明度
var timenum = 1; //执行频率
function Calpha(obj,alpha,fd)
{
	try
	{
		//alert(G(obj).filters.alpha.opacity);
	if( G(obj).filters.alpha.opacity!=alpha )
	{
		var fun = "Calpha('"+obj+"',"+alpha+","+fd+");";
		//alert(fun);
		if(fd)
		{
			G(obj).style.display="block";
			G(obj).filters.alpha.opacity = G(obj).filters.alpha.opacity+alphanum;
			if(G(obj).filters.alpha.opacity<100)
			{
				setTimeout(fun,timenum);
			}
		}else
		{
			G(obj).filters.alpha.opacity = G(obj).filters.alpha.opacity-alphanum;
			if(G(obj).filters.alpha.opacity>0)
			{
				setTimeout(fun,timenum);
			}else
			{
				G(obj).style.display = "none";
			}
		}
		
	}
	}catch(e)
	{
		//alert(e);
		if(fd)
		{
			G(obj).style.display = "block";
		}else
		{
			G(obj).style.display = "none";
		}
	}
}
var cplay = 1;  //当前播放
var aplay;   //自动播放
var hfaplay; //恢复自动播放记时器
var autotime = 5000; //自动播放间隔时间
var hftime = 20;  //多少时间恢复自动 秒
function autoplay()
{
	cplay++;
	if(cplay==5)
	{
		cplay = 1;
	}
	showad(cplay,1);
}
var jishi =1;  //记时 20秒后自动恢复
function hfauto()
{
	jishi =jishi+1;
	if(jishi>hftime)
	{
		clearInterval(hfaplay);
		aplay = setInterval(autoplay,autotime);
	}
}
aplay = setInterval(autoplay,autotime);

function getSeachUrl(obj)
{
	if(G("txtkey").value=="" || G("txtkey").value=="只需几个关键字,轻松锁定目标题")
	{
		obj.target = "_self";	
		obj.href="javascript:void(null);";
		G("txtkey").value="";
		G("txtkey").focus();
	}else
	{
		var type = G("ddlsofttype").value;
		var url  = "http://soso.diyidayi.com/"+ type +".aspx?key="+escape(G("txtkey").value);
		obj.target = "_blank";
		obj.href = url;
	}
}
function sr()
{
	if(document.getElementById("tycode").value=="请输入体验码")
	{
		document.getElementById("tycode").value="";
	}
}
function cjsr(obj)
{
	if(document.getElementById("tycode").value=="" || document.getElementById("tycode").value=="请输入体验码")
	{
		obj.target = "_self";	
		obj.href="javascript:void(null);";
		document.getElementById("tycode").value="";
		document.getElementById("tycode").focus();
	}else
	{
		obj.target = "_blank";
		obj.href = "/teacher/visitorinclass.aspx?code="+escape(document.getElementById("tycode").value);
	}
}