function logout()
{
	if(window.confirm("Sure you want to log out?"))
	{
		window.location.href="operation.php?mode=logout";
	}
}
function validateEmail(email)
{
	var re_mail = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z])+$/;
	if (!re_mail.test(email.value))
	{
		return false;
	}
	return true;
}
function validate_news(frm)
{
	if(frm.email_news.value=="")
	{
		alert("Enter Email Address !");
		frm.email_news.focus();
		return false;
	}
	if(validateEmail(frm.email_news)==false)
	{	
		alert("Invalid Email Address !");
		frm.email_news.focus();
		return false;
	}
	return true;
}
				
function validate_login(frm)
{
	if(frm.user.value=="")
	{
		alert("Please enter username !");
		frm.user.focus();
		return false;
	}
	if(frm.pass.value=="")
	{
		alert("Please enter password !");
		frm.pass.focus();
		return false;
	}
	return true;
}