var zoom;
var magInterval;


var out = new Array();
    out["home"] = new Image();
    out["home"].src = "/_resources/nesurgicalcenter.com/images/m_home.gif";
    out["products"] = new Image();
    out["products"].src = "/_resources/nesurgicalcenter.com/images/m_products.gif";
    out["aboutus"] = new Image();
    out["aboutus"].src = "/_resources/nesurgicalcenter.com/images/m_aboutus.gif";
    out["customerservice"] = new Image();
    out["customerservice"].src = "/_resources/nesurgicalcenter.com/images/m_customerservice.gif";

var ovr = new Array();
    ovr["home"] = new Image();
    ovr["home"].src = "/_resources/nesurgicalcenter.com/images/m_home_.gif";
    ovr["products"] = new Image();
    ovr["products"].src = "/_resources/nesurgicalcenter.com/images/m_products_.gif";
    ovr["aboutus"] = new Image();
    ovr["aboutus"].src = "/_resources/nesurgicalcenter.com/images/m_aboutus_.gif";
    ovr["customerservice"] = new Image();
    ovr["customerservice"].src = "/_resources/nesurgicalcenter.com/images/m_customerservice_.gif";


function iOver(img) {
	if(document.images) {
		var o = document[img];
		if(o.filters) { o.filters.blendTrans.apply(); }
		o.src = ovr[img].src;
		if(o.filters) { o.filters.blendTrans.play(); }
	}
}

function iOut(img) {
	if(document.images) {
		var o = document[img];
		if(o.filters) { o.filters.blendTrans.apply(); }
		o.src = out[img].src;
		if(o.filters) { o.filters.blendTrans.play(); }
	}
}


function LoadProductImage(handle,showloadingimage){
	
	var mainImageID = "myimage";
	var instructionsID = "ProductImageInstructions";
	var loadingImageSrc = "/_resources/nesurgicalcenter.com/images/ajax-loader.gif";
	var thumbWidth = 50;
	var thumbHeight = 50;
	var mainImageWidth = 250;
	var mainImageHeight = 250;
	var zoomImageWidth = 400;
	var zoomImageHeight = 400;	
	
	var imgSrc;
	var magnifySrc;	
	imgSrc = handle.src;
	imgSrc = imgSrc.replace("width="+thumbWidth,"width="+mainImageWidth);
	imgSrc = imgSrc.replace("height="+thumbHeight,"height="+mainImageHeight);
	magnifySrc = imgSrc;
	magnifySrc = magnifySrc.replace("width="+mainImageWidth,"width="+zoomImageWidth);
	magnifySrc = magnifySrc.replace("height="+mainImageHeight,"height="+zoomImageHeight);
	
	if(zoom){zoom.parentNode.removeChild(zoom);}
	
	if(showloadingimage){
		// -- if used in IE before main image is done loading, we get the '1 item loading' bug --- //
		var parentHandle = getElement(mainImageID).parentNode;
		parentHandle.removeChild(getElement(mainImageID));
	
		var imageLoading = new Image();
		imageLoading.onload = function() {
			imageLoading.onload = null;
		}
		imageLoading.src = loadingImageSrc;
		imageLoading.id = mainImageID;
	
		parentHandle.appendChild(imageLoading);
		// --- end IE bug --- //
	}
	
	var zoomImage = new Image();
	zoomImage.onload = function() {
		zoomImage.onload = null;
		var image = new Image();
		
		image.onload = function() {
			
			image.onload = null;
			getElement(mainImageID).src = imgSrc;
			
			var imageWidth = getElement(mainImageID).offsetWidth;			
			if(imageWidth == 16){
				magInterval = setInterval("TryToMagnifyIt('" + mainImageID + "','" + instructionsID + "','" + magnifySrc + "')", 50);
			}
			else{
				MagnifyIt(mainImageID,instructionsID,magnifySrc);
			}
			
		};
		image.src = imgSrc;
		
	};
	zoomImage.src = magnifySrc;		
}

function TryToMagnifyIt(mainImageID,instructionsID,magnifySrc){
	var imageWidth = getElement(mainImageID).offsetWidth;
	if(imageWidth > 16){
		clearInterval(magInterval);
		MagnifyIt(mainImageID,instructionsID,magnifySrc);
	}
}

function MagnifyIt(mainImageID,instructionsID,magnifySrc){
	//alert("MagnifyIt");
	// move stuff out of the way...
	var imageWidth;
	var imageHeight;
	var instructionsHeight;
	
	var applyFirefoxFix = false;

	imageWidth = getElement(mainImageID).offsetWidth;
	imageHeight = getElement(mainImageID).offsetHeight;
	instructionsHeight = getElement(instructionsID).offsetHeight;
	
	if(imageWidth > 0){				
		getElement("ProductDetailLeft").style.width = imageWidth + "px";
	}
	if(imageHeight > 0){	
		getElement("ProductMultipleImages").style.top = (imageHeight + instructionsHeight) + "px";
		getElement("ProductMultipleImages").style.display = "block";
	}	
	zoom = MojoMagnify.makeMagnifiable(getElement(mainImageID),magnifySrc);
}

function getElement(name) {
	var o1 = null;
	if(document.all) {
		o1 = document.all(name);
	}
	else if(document.getElementById) {
		o1 = document.getElementById(name);
	}
	return o1;
}

function getInternetExplorerVersion() {

    var rv = -1; // Return value assumes failure.

    if (navigator.appName == 'Microsoft Internet Explorer') {

        var ua = navigator.userAgent;

        var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");

        if (re.exec(ua) != null)

            rv = parseFloat(RegExp.$1);

    }

    return rv;

}