/*
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.
var img_height = 0;


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

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,title,description){

	img = new Image;
	img.src = imagename;
	height = img.height;
	if (height > 0){
		currentimageheight = height;
	}
	document.onmousemove=followmouse;
	
	newHTML = "";

	newHTML += '<div style="padding: 5px; background-color: #FFF; border: 1px solid #888;">';
	newHTML += '<span class="black_text"><b>' + title + '</b><br />';
	newHTML += '<span class="black_text">' + description + '</span><br/>';
	newHTML += '<div align="center" style="padding: 8px 2px 2px 2px;">';
	newHTML += '<img src="'+imagename+'">';
	newHTML += '</div>';
	newHTML += '</div>';
	gettrailobjnostyle().innerHTML = newHTML;
	gettrailobj().display="inline";
}


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

}

function followmouse(e){

	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(window.innerHeight);
	
	//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 < 420){
			xcoord = e.pageX - xcoord - 400; // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < (currentimageheight + 70)){
			ycoord += e.pageY - Math.max(0,(70 + currentimageheight + e.pageY - docheight - truebody().scrollTop));
		} else {
			ycoord += e.pageY;
		}

	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < 420){
			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 + 70)){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(70 + 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);
		if(ycoord < 0) { ycoord = ycoord*-1; }
	gettrailobj().left=xcoord+"px";
	gettrailobj().top=ycoord+"px";

}