function IsNumeric(sText)
		{
			var ValidChars = "0123456789";
			var IsNumber=true;
			var Char;

			for (i = 0; i < sText.length && IsNumber == true; i++) 
				{ 
				Char = sText.charAt(i); 
				if (ValidChars.indexOf(Char) == -1) 
					{
					IsNumber = false;
					}
				}
			return IsNumber;
		}
		
function IsFloat(sText)
		{
			var ValidChars = "0123456789.";
			var IsNumber=true;
			var Char;

			for (i = 0; i < sText.length && IsNumber == true; i++) 
				{ 
				Char = sText.charAt(i); 
				if (ValidChars.indexOf(Char) == -1) 
					{
					IsNumber = false;
					}
				}
			return IsNumber;
		}
		
function over(x)
		{
			x.style.backgroundColor="#d7ccaa";
		}
		
		function out(x)
		{
			x.style.backgroundColor="#f3f2ed"
		}