function est(estfrm)
{
	var estcost;
	var numbut;
	var tempnumbut;
	
	estcost = 25;
	
	if (document.estimate.num.value == "")
	{
		alert("You must enter a number value for the Number of Buttons");
		document.estimate.num.select();
		return false;
	}
	
	if (isNaN(document.estimate.num.value) == true)
	{
		alert("You must enter a number value for the Number of Buttons");
		document.estimate.num.select();
		return false;
	}
	
	numbut = parseInt(document.estimate.num.value);
	
	if (numbut > 500)
	{
		document.estimate.cost.value = "CALL";
		return false;
	}
	
	if ((numbut - 150) <= 0)
	{
		estcost = estcost + (numbut * 1.15);
	}else{
		estcost = estcost + (150 * 1.15);
		numbut = numbut - 150;
		if ((numbut - 100) <= 0)
		{
			estcost = estcost + (numbut * 1.05);
		}else{
			estcost = estcost + (100 * 1.05);
			numbut = numbut - 100;
			estcost = estcost + (numbut * .90);
		}
	}
	document.estimate.cost.value = "$" + estcost;
	return false;
}