function IsEmpty(TxtElement)
	{
		if (TxtElement.value.replace(/ /g, "") == "")
		{
			TxtElement.style.background = "#ffff00"; 
			TxtElement.focus();
			TxtElement.select();
			return true;
		}
		else 
		{
			TxtElement.style.background = "#ffffff";
			return false;
		}
	}
	
	function IsNumber(TxtElement)
	{
		if (isNaN(TxtElement.value))
		{
			TxtElement.style.background = "#ffff00"; 
			TxtElement.focus();
			TxtElement.select();
			return false;
		}
		else
		{ 
			TxtElement.style.background = "#ffffff";
			return true;
		}
	}
	
	function IsValidLength(TxtElement, Length)
	{
		if (TxtElement.value.length < Length)
		{
			TxtElement.style.background = "#ffff00";
			TxtElement.focus();
			TxtElement.select();
			return false;
		}
		else
		{
			TxtElement.style.background = "#ffffff";
			return true;
		}
		
	}
	
	function IsChecked(Array)
	{
		for(var i=0; i < Array.length; i++)
			{
				if (Array[i].checked == true)
					return true;
			}
			Array[0].focus();
			return false;
	}