function isNumeric(fx_str) {
	var varValidChars = "0123456789";
	var varChar;
	var fx = true;
	var varFixedStr = '';

	if (fx_str.length == 0) return false;

	for (i = 0; i < fx_str.length && fx == true; i++) {
		varChar = fx_str.charAt(i);
		if (varValidChars.indexOf(varChar) == -1) {
			fx = false;
		} else {
			varFixedStr = varFixedStr + fx_str.charAt(i);
		}
	}
	return fx;
}



function changeQTY(fx,fx_tax,fx_shipping){
	if (isNumeric(fx.value) != true) {
		alert('Please use a valid number for your quantity.');
	} else {
		document.getElementById('payPalFormQty').value=fx.value;
		document.getElementById('payPalFormTax').value=fx.value*fx_tax;
		document.getElementById('payPalFormShipping').value=fx.value*fx_shipping;
	}
}


xpsJSPage = 'ran';