// JavaScript Document
function checklogin(theform)
{
	if(theform.loginusername.value=="")
	{
		alert("请输入登录用户名！");
		theform.loginusername.focus();
		return false;
	}
	
	if(theform.loginpassword.value=="")
	{
		alert("请输入登录密码！");
		theform.loginpassword.focus();
		return false;
	}
	
	return true;
}

function checkall(form) 
{
	for(var i = 0;i < form.elements.length-1; i++) 
	{
		var e = form.elements[i];
		if (e.name != 'chkall') 
		{
			e.checked = !e.checked;
		}
	}
}