function validateForm(val) {
	var noStck = document.getElementById("outOfStockAck");
	if(noStck){
		if(noStck.checked == false){
			alert("Please check the Out of Stock Acknowledgement box.");
			return false;
		}
	}
	
	var chk = document.getElementById("custom-checkbox");
	if(chk){
		if(chk.checked == true){
			$('#flat-rate').attr("value", "1");
			$('#flat-rate-opt').attr("value", "(+$" + val + ")");
		}else{
			$('#flat-rate').attr("value", "0");
		}
	}
	
    return true;
}