function checkform(){
			if (user_add.nickname.value=="") {alert('登录名不能为空');return false;}
			if (user_add.password.value!=user_add.password1.value) {alert('两次密码输入不相同');return false;}
			if (user_add.lxr.value=="") {alert('真实姓名不能为空');return false;}
			if (!testEmail(user_add.email.value)) {return false;}
			return true;
		}
function testEmail(email){
			MyReg = /^[_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,3}$/i;
			if (MyReg.test(email)){
				return true;
			}else{
				alert(email + "不是有效的eMail地址，请重新输入！如：ok@enet.com.cn");
				return false;
			}
		}


function checkformBusiness(){
			if (form1.title.value=="") {alert('标题不能为空');return false;}
			if (form1.body.value=="") {alert('正文不能为空');return false;}
			if (!testEmail1(form1.email.value)) {return false;}
			return true;
		}
		function testEmail1(email){
			MyReg = /^[_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+\.)+[a-z]{2,3}$/i;
			if (MyReg.test(email)){
				return true;
			}else{
				alert(email + "不是有效的eMail地址，请重新输入！如：ok@enet.com.cn");
				return false;
			}
		}

function switchCell(n, hash) 
{
	var i ;

	/*
	document.getElementById('tb_content').height	= screen.availHeight - 680;

	for(i=0;i<navcell.length;i++)
	{
		navcell[i].className	= "tab-off";
		tab[i].style.display	= "none";
	}
	
	navcell[n-1].className	= "tab-on";
	tab[n-1].style.display	= "block";
*/
	document.getElementById('navcellA').className	= "tab-off";
	document.getElementById('tabA').style.display	= "none";

	document.getElementById('navcellB').className	= "tab-off";
	document.getElementById('tabB').style.display	= "none";

	document.getElementById('navcellC').className	= "tab-off";
	document.getElementById('tabC').style.display	= "none";

	document.getElementById('navcellD').className	= "tab-off";
	document.getElementById('tabD').style.display	= "none";
	
	if(n==1){
		document.getElementById('navcellA').className	= "tab-on";
		document.getElementById('tabA').style.display	= "block";
	}else if(n==2){
		document.getElementById('navcellB').className	= "tab-on";
		document.getElementById('tabB').style.display	= "block";
	}else if(n==3){
		document.getElementById('navcellC').className	= "tab-on";
		document.getElementById('tabC').style.display	= "block";
	}else if(n==4){
		document.getElementById('navcellD').className	= "tab-on";
		document.getElementById('tabD').style.display	= "block";
	}
	//window.scroll(0,0);
}