function validate()
{
	
	if (document.login.username.value=='')
	{
		alert('Please enter Username.');
		document.login.username.focus();
		return false;
	}
	if (document.login.password.value=='')
	{
		alert('Please enter Password.');
		document.login.password.focus();
		return false;
	}
	else
	{
		return true;
	}
}