function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function validateForm(fields,form) {
	
	var aFields = fields.split(',');
	var error = "";
	var fieldEl = "";
	
	for (i = 0; i < aFields.length; i++) {
		fieldEl = document.getElementById(aFields[i]);
		if (fieldEl.type == "select-one") {
			if (fieldEl[fieldEl.selectedIndex].value == "NULL") {
				error += "You must select a " + fieldEl.title + ".\n\r";
			}
		} else {
			if (fieldEl.value == '') {
				if (fieldEl.type == "file") {
					if (document.getElementById('category_id').value == '5') {
						if (fieldEl.name != 'proImageSm') {
							error += "You must select a " + fieldEl.title + " to upload.\n\r"; 
						}
					} else {
						error += "You must select a " + fieldEl.title + " to upload.\n\r";
					}
				} else {
					error += "You must fill in the " + fieldEl.title + " field.\n\r";
				}
			}
		}
	}
	
	if (error != "") {
		alert(error);
		return false;
	} else {
		document.getElementById(form).submit();
		return true;
	}	
}

function checkCategorySelection(field) {
	if (field.value == '5') {
		document.getElementById('proImageSmall').style.display = 'none';
	} else {
		document.getElementById('proImageSmall').style.display = 'block';
	}
	document.getElementById('category_id').value = field.value;
}

function setLargeImage(n) {
	document.getElementById('categoryImageLarge').src = "/images/products/" + n;
}

function setContinueButton(n) {
	if (n == 'PayPal') {
		document.getElementById('checkout_creditcard').style.display = "none";
		document.getElementById('checkout_PayPal').style.display = "block";
	} else {
		document.getElementById('checkout_PayPal').style.display = "none";
		document.getElementById('checkout_creditcard').style.display = "block";
	}
}

function syncBilling() {
	
	name  = document.getElementById('shipname').value;
	addr1 = document.getElementById('shipaddress1').value;
	city  = document.getElementById('shipcity').value;
	state = document.getElementById('shipstate').value;
	zip   = document.getElementById('shipzip').value;
	
	document.getElementById('billname').value		= name;
	document.getElementById('billaddress1').value	= addr1;
	document.getElementById('billcity').value		= city;
	document.getElementById('billstate').value		= state;
	document.getElementById('billzip').value		= zip; 
	
}