function IsValidTextBox(ControlID, ControlName)
{
	var cntrl = document.all(ControlID)
	if (cntrl != null)
	{
		if (cntrl.value == '')
		{
			alert (ControlName+' cannot be empty');
			return false;
		}
		else
		{
			return true;
		}
	}
	else
	{
		alert('Specified control not found');
		return false;
	}
}

function IsValidListBox(ControlID, ControlName)
{
	var cntrl = document.all(ControlID)
	if (cntrl != null)
	{
		if (cntrl.selectedIndex == 0 )
		{
			alert('Please select a value for '+ControlName);
			return false;
		}
		else
		{
			return true;
		}
	}
	else
	{
		alert('Specified control not found');
		return false;
	}
}