function trim(inputString) 
{
	if (typeof inputString != "string") 
		{ return inputString; }
			
	var retValue = inputString;
	var ch = retValue.substring(0, 1);
	while (ch == " ") 
		{
			retValue = retValue.substring(1, retValue.length);
			ch = retValue.substring(0, 1);
		}
	ch = retValue.substring(retValue.length-1, retValue.length);
	while (ch == " ") 
		{ 
			retValue = retValue.substring(0, retValue.length-1);
			ch = retValue.substring(retValue.length-1, retValue.length);
		}
	while (retValue.indexOf("  ") != -1) 
		{ 
			retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length);
		}
	return retValue; // Return the trimmed string back to the user
} 
function validateNumber()
{
	//0:48 - 9:57
	if(event.keyCode < 48 || event.keyCode > 57 )
		event.keyCode = null;
}