//checks to make sure customer wanted to put 0 for an item quantity
//submits form or focuses on the item quantity
	function updateCart(field){
		focusedForm=field.form;
		if(field.value == "0"){
			if(confirm("Entering 0 for an item quantity will remove that item from your cart.\n\n"+
									"Do you want to remove this item from your cart?")){
				focusedForm.submit();
			}
			else{
				field.focus();
			}
		}
		else{
			focusedForm.submit();
		}
	}//end updateCart()
	
//checks shipTo drop down on change
//submits cart or redirects to shipping.php
	function updateShipTo(field, site){
		if(field.value == "new"){
			regularExpression = /([0-9]*)([a-zA-Z]*)/;
			cartId = regularExpression.exec(field.name);
			from = window.location.pathname;
			slashIndex = from.lastIndexOf("/");
			from = from.substring(slashIndex+1, from.length);
			window.location.replace(site+"checkout/shipTo.php?from="+from+"&cartId="+cartId[1]);
		}
		else{
			field.form.submit();
		}
	}//end updateShipTo()
	
//checks shipToName drop down on change
//reloads shipto.php with newly selected name
	function loadShipTo(field){
		thisValue=field.value;
		for (x=0;x<field.form.length;x++){
			field.form.elements[x].value="";
		}
		field.value=thisValue;
		field.form.elements['nextPage'].value="-1";
		field.form.elements['noValidate'].value="1";
		field.form.submit();
	}//end updateShipTo()

//return index of current form element
	function getElementIndex(field){
		for(x=0;x<field.form.length;x++){
			if(field.form.elements[x].name==field.name){
				return x;
			}
		}
		return -1;//should never happen
	}//end getElementIndex()
	
//empies the payment fields and submits the form
//called when changing the type of payment method
	function changePaymentMethod(field){
		thisIndex = getElementIndex(field);
		for(x=thisIndex+1;x<field.form.length;x++){
			field.form.elements[x].value="";
		}
		if(field.form.elements['nextPage'])field.form.elements['nextPage'].value="-1";
		field.form.submit();
	}//end changePaymentMethod()
	
//changes the form action, submits the form
//returns nothing
	function addGiftWrap(field){
		field.form.action = "addGiftWrap.php";
		from = window.location.pathname;
		slashIndex = from.lastIndexOf("/");
		if(from.substring(slashIndex-8,slashIndex+1)=="checkout/"){
			slashIndex-=9;
			field.form.action="../"+"addGiftWrap.php";
		}
		from = from.substring(slashIndex+1, from.length);
		field.form.action+="?from="+from;
		field.form.submit();
	}//end addGiftWrap()
	
//makes sure at least one value in the form is filled out
//returns bool
	function blankFormCheck(formObject){
		if (submitted == true) {//keep the forms from being submitted more than once
			return false;
		}
		else {
			// everything is ok check the fields, ie using if (document.... .lenght == 0) alert...
			submitted = true ;
		}
		skippedFields = new RegExp("(prefixId|nextPage|shipToId|businessFlag)");
		for(x=0; x<formObject.length;x++){//loop through each form object
			if(!(skippedFields.test(formObject.elements[x].name))){
				if(formObject.elements[x].value.length > 0){
					return true;
				}
			}
		}
		//went through entire form and found no values entered
		return false;
	}//end blankFormCheck()
	
//makes sure at least the address is not a po box
//returns bool
	function isPOBox(field){
		return true;//don't worry about this for so
		//POBoxExp = /^(P)(.){0,2}(O)(.)*(BOX)/i;
		//address = field.form.elements['streetAddress'].value
		//if(POBoxExp.exec(address)){
		//	alert("We cannot ship to P.O. Boxes");
		//	return false;
		//}
		//else{
		//	return true;
		//}
	}//end isPOBox()
	
//tests payment entered and updates next page value
//returns bool
	function applyPayment(field, amountDue){
		formObject = field.form;
		field.disbled = true;
		regularExpression = /(payment[0-9]{1,4})/;
		oldPayments = 0.0;
		newPayment = 0.0
		for(x=0; x<formObject.length; x++){//build payment data
			if(regularExpression.test(formObject.elements[x].name)){
				oldPayments+=formObject.elements[x].value - 0.0;
			}
			else if(formObject.elements[x].name=="payment"){
				oldPayments+=formObject.elements[x].value - 0.0;
			}
			else if(formObject.elements[x].name == "Amountpayment"){
				newPayment = formObject.elements[x].value-0.0;
			}
		}
		if(field.type == "image"){//adding a payment
			amountPaid = oldPayments + newPayment;
		}
		else{//updating payment
			if(field.form.elements['Amountpayment']){field.form.elements['Amountpayment'].value="";}
			if(field.form.elements['IdNumberpayment']){field.form.elements['IdNumberpayment'].value="";}
			amountPaid = oldPayments;
			oldPayments = oldPayments - field.value - 0.0;
			updatedPayment = field.value - 0.0;
			if((updatedPayment*100)<1){//if the customer entered less than a penny
				if(!confirm("Do you want to remove this payment?")){//if the customer says no undo what they did
					formObject.reset();
					field.focus();
					return false;
				}
			}
		}//end else
		difference = decimalToString(amountDue,2) - decimalToString(amountPaid,2) -0;
		if((difference*100)>=1){//if the customer isn't paying the full amount with this payment just continue
			return true;
		}
		//the customer is paying the total or more
		if(field.type == "image"){//adding a payment
			//check if difference is negative
			if(difference < 0){
				confirmString = "You entered $"+decimalToString(newPayment, 2)+".\n";
				confirmString+= "You only owe $"+decimalToString((amountDue - oldPayments), 2)+".\n";
				confirmString+= "Do you want to apply $";
				confirmString+= decimalToString((amountDue - oldPayments), 2);
				confirmString+= " to this payment method?";
				if(formObject.elements['paymentTypeId'][formObject.elements['paymentTypeId'].selectedIndex].innerHTML=="Cash"){
					confirmString= "Please give the customer $"+decimalToString(Math.abs(difference),2)+" change.";
				}
				if(confirm(confirmString)){
					field.form.elements['Amountpayment'].value =  decimalToString((amountDue - oldPayments), 2);
					field.form.elements['nextPage'].value=0;
					return true;
				}
				else{
					field.form.elements['Amountpayment'].focus();
					return false;
				}
			}
			//if difference matches amount due continue
			if((difference*100)<1){
				field.form.elements['nextPage'].value=0;
				return true;
			}
		}//if(field.type == "image")
		else{//this is an old payment getting altered
			if(difference < 0){
				confirmString = "You entered $"+decimalToString(updatedPayment, 2)+".\n";
				confirmString+= "You only owe $"+decimalToString((amountDue - oldPayments), 2)+".\n";
				confirmString+= "Do you want to apply $";
				confirmString+= decimalToString((amountDue - oldPayments), 2);
				confirmString+= " to this payment method?";
			}
			else{
				confirmString = "Do you want to put the remaining $";
				confirmString+= decimalToString((amountDue - oldPayments), 2);
				confirmString+= " on this payment?";
			}
			if(confirm(confirmString)){
				field.value =  decimalToString((amountDue - oldPayments), 2);
				field.form.elements['nextPage'].value=0;
				return true;
			}
			else{
				field.focus();
				return false;
			}
		}
		return false;
	}
	
	function decimalToString(floatToConvert, decimalPlaces){
		floatToConvert= floatToConvert+"";
		errorFlag = false;
		convertedString = "";
		
		if(floatToConvert.search(/^(-)?[0-9]*\.?[0-9]*$/) > -1){//make sure it is a decimal number
			decimalIndex = floatToConvert.lastIndexOf(".");
			intValue = floatToConvert.substr(0,decimalIndex);
			if(decimalIndex < 0){intValue=floatToConvert;}
			convertedString = intValue+".";
			decimalValue = floatToConvert.substr(decimalIndex+1, decimalPlaces);
			if(decimalIndex < 0){
				decimalValue = "";
				for(x=1;x<=decimalPlaces;x++){decimalValue+="0";}
			}
			startingLength = decimalValue.length
			if(startingLength<decimalPlaces){
				for(counter=0; counter<(decimalPlaces-startingLength);counter++){
					decimalValue+="0";
				}
			}
			convertedString+=decimalValue;
		}else errorFlag = true;
		return convertedString;
	}
	
	function changeShippingMethod(field, show){
		formObject = field.form;
		message = "";
		now = new Date;
		if(now.getUTCHours() >=15 || now.getUTCHours() < 5){
			message += "Orders placed after 10:00 a.m. (CST) are processed the next business day.";
		}
		if(show){
			message += "\nExpress shipping applies only to items currently in stock.";
		}
		if(field.value == "basic"){message = "";}
		if(message.length > 0){
			alert(message);
		}
		formObject.submit();
		return true;
	}
	
	function translateZip(xmlFile){
		// code for Mozilla, etc.
		if (window.XMLHttpRequest){
  		xmlhttp=new XMLHttpRequest();
  		xmlhttp.onreadystatechange=displayLocation;
  		xmlhttp.open("GET",xmlFile,true);
  		xmlhttp.send(null);
  	}
		// code for IE
		else if (window.ActiveXObject){
		  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
		  if (xmlhttp){
		  	xmlhttp.onreadystatechange=displayLocation;
		  	xmlhttp.open("GET",xmlFile,true);
		  	xmlhttp.send();
    	}
  	}
  	//else{alert("this browser doesn't support this feature");}
  	return true;
	}
	
	function displayLocation(){
		// if xmlhttp shows "loaded"
		if (xmlhttp.readyState==4){
  		// if "OK"
  		if (xmlhttp.status==200){
  			response=xmlhttp.responseText;
  			responseArray = response.split("\n");
  			if(responseArray[0]==""){startIndex = 1;}
  			else{startIndex = 0;}
  			if(document.forms[1].elements['city'].value=="" && responseArray[startIndex]!=""){
  				document.forms[1].elements['city'].value=responseArray[startIndex];
  				if(document.forms[1].elements['state'].value==""){
  					document.forms[1].elements['state'].value=responseArray[(startIndex+1)];
  				}
  			}
  			document.forms[1].elements['phoneNumber'].focus();
  		}
  	}
	}