/*
Simple Image Trail script- By JavaScriptKit.com
Visit http://www.javascriptkit.com for this script and more
This notice must stay intact
*/

var offsetfrommouse=[15,15]; //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset
var displayduration=0; //duration in seconds image should remain visible. 0 for always.
var currentimageheight = 270;	// maximum image size.

function gettrailobj(){
if (document.getElementById)
return document.getElementById("trailimageid").style
else if (document.all)
return document.all.trailimagid.style
}

function gettrailobjnostyle(){
if (document.getElementById)
return document.getElementById("trailimageid")
else if (document.all)
return document.all.trailimagid
}


function truebody(){
return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function showtrail(imagename, height, evt){
	if (height > 0){
		currentimageheight = height;
	}

	document.onmousemove=followmouse;

	newHTML = '<div style="padding: 0px; background-color: #FFF; border: 1px solid #a18852;">';
	newHTML = newHTML + '<div align="center" style="padding: 0px 0px 0px 0px;">';
	newHTML = newHTML + '<img src="' + imagename + '" border="0"></div>';
	newHTML = newHTML + '</div>';
	gettrailobjnostyle().innerHTML = newHTML;
	//gettrailobj().display="block";
	gettrailobj().display="inline";
	followmouse(undefined);
}

function hidetrail(node){
	//gettrailobj().innerHTML = "";
	gettrailobj().display="none";
	document.onmousemove="";
	//gettrailobj().left="-500px";
}

function followmouse(e){

	var xcoord=offsetfrommouse[0]
	var ycoord=offsetfrommouse[1]
	if(typeof currentimageheight != 'number') currentimageheight = parseInt(currentimageheight);

	var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
	var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight)

    //alert("y start "+ycoord);
	//if (document.all){
	//	gettrailobjnostyle().innerHTML = 'A = ' + truebody().scrollHeight + '<br>B = ' + truebody().clientHeight;
	//} else {
	//	gettrailobjnostyle().innerHTML = 'C = ' + document.body.offsetHeight + '<br>D = ' + window.innerHeight;
	//}

    var pagey = 0;
	if (typeof e != "undefined"){
		if (docwidth - e.pageX < 380){
			xcoord = e.pageX - xcoord - 400; // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < (currentimageheight + 110)){
			ycoord += e.pageY - Math.max(0,(110 + currentimageheight + e.pageY - docheight - truebody().scrollTop));
		} else {
			ycoord += e.pageY;
		}
		pagey = e.pageY;

	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < 380){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - 400; // Move to the left side of the cursor
		} else {
			xcoord += truebody().scrollLeft+event.clientX
		}
		if (docheight - event.clientY < (currentimageheight + 110)){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(110 + currentimageheight + event.clientY - docheight));
		    //alert("now y "+ycoord+" from st "+truebody().scrollTop+" and ecy "+event.clientY+" and mmax "+Math.max(0,(110 + currentimageheight + event.clientY - docheight))+" calced from "+110+", "+currentimageheight+", "+event.clientY+", "+docheight+".");
		} else {
			ycoord += truebody().scrollTop + event.clientY;
		    //alert("now y "+ycoord+" from st "+truebody().scrollTop+" and ecy "+event.clientY);
		}
		pagey = event.clientY+truebody().scrollTop;
	}

	if(ycoord < 0) { ycoord = ycoord*-1; }
	//alert(" go to "+xcoord+", "+ycoord+", docheight "+docheight+", type "+(typeof e)+", type2 "+(typeof window.event)+", pagey "+pagey+", offset "+offsetfrommouse[1]+", currimgh "+currentimageheight+".");
	gettrailobj().left=xcoord+"px"
	gettrailobj().top=ycoord+"px"

}

if (document.getElementById || document.all){
	document.write('<div id="trailimageid">');
	document.write('</div>');
}

function setupShowtrail()
{

mouseoverImages = $$(".showtrail");
mouseoverImages.each(function(node){
    node.onmouseover = function(evt) { 
        if (typeof evt == 'undefined') {
            evt = window.event;
        }
        showtrail(node.getAttribute('largeImg'), node.getAttribute('largeImgSize'), evt); 
    }
    node.onmouseout = function() {hidetrail(node);};
});
}