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

var offsetfrommouse=[30,30]; //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 = 200;	// maximum image size.

var currentimagewidth = 200;	// maximum image size.
var timer1;
var timer2;


if (document.getElementById || document.all){
  document.write('<div id="preview_div" style="display: none; position: absolute; z-index: 110; left: -500px; top: 887px;padding:4px;border:1px solid #cccccc;background:#ffffff">');
  document.write('</div>');
}

function gettrailobj(){
if (document.getElementById)
return document.getElementById("preview_div").style
}

function gettrailobjnostyle(){
if (document.getElementById)
return document.getElementById("preview_div")
}

function getfn(n) {
	return 'var'+n.substring(n.lastIndexOf('/')+1).split('.')[0];
}


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


function hidetrail(){	
	gettrailobj().display= "none";
	document.onmousemove=""
	gettrailobj().left="-2000px"
	clearTimeout(timer1);
	clearTimeout(timer2);
}

function showtrail(thumbname, imagename,title,showthumb, thumbW, thumbH){
	tn = thumbname
	i = imagename
	t = title
	s = showthumb
	if (thumbW > thumbH) {
		scale = currentimagewidth / thumbW;
	} else {
		scale = currentimageheight / thumbH
	}
	realW = Math.round(thumbW*scale);
	realH = Math.round(thumbH*scale);
	if ($('preview_div').getAttribute(getfn(imagename))!=null) {
		timer2 = setTimeout("show('"+tn+"','"+i+"',t,s,"+realW+","+realH+");",100);
	}
	else {
		timer1 = setTimeout("show('"+tn+"','',t,s,"+realW+","+realH+");",100);
		timer2 = setTimeout("show('"+tn+"','"+i+"',t,s,"+realW+","+realH+");",1500);
	}
}
function show(thumbname,imagename,title,showthumb, realW, realH){
    var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth - offsetfrommouse[0]
	var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight)

if( (navigator.userAgent.indexOf("Firefox")!=-1 || (navigator.userAgent.indexOf("Opera")==-1 && navigator.appVersion.indexOf("MSIE")!=-1)) && (docwidth>200 && docheight>200)) {

		document.onmousemove=followmouse; 
	
		newHTML = '<div class="border_preview">';
		if (imagename == '') {
		newHTML = newHTML + '<img src="' + thumbname + '" border="0" style="width:' + realW + 'px; height:' + realH + 'px">';	
		}
		else {
		newHTML = newHTML + '<img src="' + thumbname + '" border="0" style="width:' + realW + 'px; height:' + realH + 'px">';	
		newHTML = newHTML + '<img src="' + imagename + '" border="0" style="width:' + realW + 'px; height:' + realH + 'px; margin-left:-'+ realW +'px; margin-top:-'+ realH +'px">';	
		}
		$('preview_div').setAttribute(getfn(imagename),1);
		newHTML = newHTML + '</div>';
		//if(navigator.userAgent.indexOf("Firefox")==-1){
		//	newHTML = newHTML+'<iframe src="about:blank" scrolling="no" frameborder="0" width="290" height="220"></iframe>';
		//}
		gettrailobjnostyle().innerHTML = newHTML;
		gettrailobj().display="block";
	}
}

function followmouse(e){

	var xcoord=offsetfrommouse[0]
	var ycoord=offsetfrommouse[1]

	var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth - offsetfrommouse[0]
	var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight)

	bottomDist = 50
			
	if (typeof e != "undefined"){
		if (docwidth - e.pageX < currentimagewidth + 60){
			if(navigator.userAgent.indexOf("Firefox")!=-1)	{
				xcoord = e.pageX - xcoord - currentimagewidth -80 + 2*offsetfrommouse[0]} else{ 
				xcoord = e.pageX - xcoord - currentimagewidth -80 + 6*offsetfrommouse[0] ;} // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < (currentimageheight + bottomDist)){
			ycoord += e.pageY - Math.max(0,(bottomDist + currentimageheight + e.pageY - docheight - truebody().scrollTop));
		} else {
			ycoord += e.pageY;
		}
	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < currentimagewidth + 60){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - currentimagewidth -80 + 2*offsetfrommouse[0]; // Move to the left side of the cursor
		} else {
			xcoord += truebody().scrollLeft+event.clientX
		}
		if (docheight - event.clientY < (currentimageheight + bottomDist)){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(bottomDist + currentimageheight + event.clientY - docheight));
		} else {
			ycoord += truebody().scrollTop + event.clientY;
		}
	}

	var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-offsetfrommouse[0]
	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"
}