/*
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 = 50;	// maximum image size.
var allowpopup = true; // allow popup to be displayed

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

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

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


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

function showtrail(imagelocation){
	if (allowpopup == true) {
		// NEW ***
		document.onmousemove=followmouse;

		newHTML = '<div class="casestudy_popup">';
		newHTML = newHTML + '<div class="casestudy_popup_image_div" ><img src="' + imagelocation + '" alt="" /></div>';
		newHTML = newHTML + '</div>';

		gettrailobjnostyle().innerHTML = newHTML;

		gettrailobj().visibility="visible";
	}
}


function hidetrail(){
	if (allowpopup == true) {
		gettrailobj().visibility="hidden"
		document.onmousemove=""
		gettrailobj().left="-500px"
	}
}

function followmouse(e){
	if (allowpopup == true) {
		var xcoord=offsetfrommouse[0]
		var ycoord=offsetfrommouse[1]

		var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
		//var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(document.body.offsetHeight, window.innerHeight)
		var docheight = 1050
		//if (document.all){
		//	gettrailobjnostyle().innerHTML = 'A = ' + truebody().scrollHeight + '<br>B = ' + truebody().clientHeight;
		//} else {
		//	gettrailobjnostyle().innerHTML = 'C = ' + document.body.offsetHeight + '<br>D = ' + window.innerHeight;
		//}

		if (typeof e != "undefined"){
			if (docwidth - e.pageX < 300){
				xcoord = e.pageX - xcoord - 286; // Move to the left side of the cursor
			} else {
				xcoord += e.pageX;
			}
			if (docheight - e.pageY < (currentimageheight + 10)){
				ycoord += e.pageY - Math.max(0,(10 + currentimageheight + e.pageY - docheight - truebody().scrollTop));
			} else {
				ycoord += e.pageY;
			}

		} else if (typeof window.event != "undefined"){
			if (docwidth - event.clientX < 300){
				xcoord = event.clientX + truebody().scrollLeft - xcoord - 286; // Move to the left side of the cursor
			} else {
				xcoord += truebody().scrollLeft+event.clientX
			}
			if (docheight - event.clientY < (currentimageheight + 10)){
				ycoord += event.clientY + truebody().scrollTop - Math.max(0,(10 + currentimageheight + event.clientY - docheight));
			} else {
				ycoord += truebody().scrollTop + event.clientY;
			}
		}

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

		gettrailobj().left=xcoord+"px"
		gettrailobj().top=ycoord+"px"
	}
}