/*-----------------------------------------------------------------------------
Function:	isNumber
Purpose:	validate passed value is a number
Author:		Ben Lochner
Date:		04/07/05
Inputs:		inputname - passed value
Output:		success - true
			failure - alert window, false
*/
function isNumber(inputname) 
{
	var valid = "0123456789" ;
	var temp;
	
	if ((inputname != "") || (inputname != "undefined"))
	{
		for (var i=0; i<inputname.length; i++) 
		{
			temp = "" + inputname.substring(i, i+1);
			if (valid.indexOf(temp) == -1) 
				return false;
	
		}
		return true ;
	}
	
	return false;
}