//登陆判断
function SetFocus()
{
if (document.Login.UserName.value=="")
	document.Login.UserName.focus();
else
	document.Login.UserName.select();
}
function CheckForm()
{
	if(document.Login.UserName.value=="")
	{
		alert("请输入用户名！");
		document.Login.UserName.focus();
		return false;
	}
	if(document.Login.Password.value == "")
	{
		alert("请输入密码！");
		document.Login.Password.focus();
		return false;
	}
		if(document.Login.verifycode.value == "")
	{
		alert("请输入验证码！");
		document.Login.verifycode.focus();
		return false;
	}
}
//层转换1
function switchTab(tab_id) {
	document.getElementById("mid-left3").style.display = "none";
	document.getElementById("mid-left4").style.display = "none";
	document.getElementById(tab_id).style.display = "block";
}
//层转换2
function switchTab2(tab_id) {
	document.getElementById("mid-left2").style.display = "none";
	document.getElementById("mid-left20").style.display = "none";
	document.getElementById(tab_id).style.display = "block";
}
//打印
	function bb() {
		var strTemp = document.all.htmlContent.innerHTML;
		document.body.innerHTML = "<center>" + strTemp + "</center>";		
		window.print();
		window.history.go(0);
	}