var curPanel;
function addToCart(prd_id){

	msg = document.getElementById("shopMessage");
	cartImg = document.getElementById("cartImg" + prd_id);

	msg.style.top = getImagePageTop(cartImg);
	msg.style.left = getImagePageLeft(cartImg) - 100;
	msg.style.display = "";
	

	quantity = document.getElementById("cart"+prd_id).value
	formData = "procType=ADD&prd_id=" + prd_id + "&quantity=" + quantity;
	getData(pageURL + "_shopping_cart.asp",updatePanel,formData,document.getElementById("shopItems"));
}
var req;
function getData(url,processFunction,postData,cPanel) {
	req = false;
    // branch for native XMLHttpRequest object
    if(window.XMLHttpRequest) {
    	try {
			req = new XMLHttpRequest();
        } catch(e) {
			req = false;
        }
    // branch for IE/Windows ActiveX version
    } else if(window.ActiveXObject) {
       	try {
        	req = new ActiveXObject("Msxml2.XMLHTTP");
      	} catch(e) {
        	try {
          		req = new ActiveXObject("Microsoft.XMLHTTP");
        	} catch(e) {
          		req = false;
        	}
		}
    }
	if(req) {
		curPanel = cPanel;
		req.onreadystatechange = processFunction;
		req.open("POST", url, true);
		req.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');		
		req.send(postData);
	}
}	

function updatePanel() {
    if (req.readyState == 4) {
        if (req.status == 200) {
          curPanel.innerHTML = req.responseText
        } else {
		  alert(req.responseText)
		  alert("Error Retrieving Files.");
        }
    }
}

function getImagePageLeft(img) {
  var x, obj;
    x = 0;
    obj = img;
    while (obj.offsetParent != null) {
      x += obj.offsetLeft;
      obj = obj.offsetParent;
    }
    x += obj.offsetLeft;
    return x;
}

function getImagePageTop(img) {
  var y, obj;
    y = 0;
    obj = img;
    while (obj.offsetParent != null) {
      y += obj.offsetTop;
      obj = obj.offsetParent;
    }
    y += obj.offsetTop;
    return y;
}

function fade(tmpText){
	tmp = document.getElementById(tmpText);
	tmp.style.opacity = tmp.style.opacity * .80;
	
	alert(tmp.style.opacity )
	if(tmp.style.opacity > .15){
		window.setTimeout('fade("shopMessage")',50);
	}

}