function Show(EleID)
{
	document.getElementById(EleID).style.visibility = "visible";
}

function Hide(EleID)
{
	document.getElementById(EleID).style.visibility = "hidden";
}

function OnLoadEvent()
{
	Hide("InvalidUser");
	Hide("InvalidPass");
	Hide("ErrMsg");
}

function ClearError(WhichField)
{
	Hide(WhichField);

	if (document.getElementById("InvalidUser").style.visibility == "hidden" && document.getElementById("InvalidPass").style.visibility == "hidden")
	{
		Hide("ErrMsg");
	}
}

function CheckFields()
{				
	if (document.getElementById("Username").value == "")
	{
		Show("InvalidUser");
	}
	
	if (document.getElementById("Password").value == "")
	{
		Show("InvalidPass");
	}
					
	if (document.getElementById("InvalidUser").style.visibility == "visible" || document.getElementById("InvalidPass").style.visibility == "visible")
	{
		Show("ErrMsg");
	}

	if (document.getElementById("ErrMsg").style.visibility == "hidden")
	{
		document.getElementById("frmLogin").submit();
		//alert("hi");
	}

}