var offsetfrommouse=[20,21]; //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 defaultimageheight = 0;	// maximum image size.
var defaultimagewidth = 0;	// maximum image size.

var timer;

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

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


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


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

function showtrail(imagename,title,width,height){ 
	var jerImg = new Image();
	jerImg.src = imagename;
	i = imagename;
	t = title;
	w = jerImg.width;
	h = jerImg.height;
	timer = setTimeout("show('"+i+"',t,w,h);",200);
}
function show(imagename,title,width,height){ //alert(navigator.userAgent.indexOf("MSIE"));
 
    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("Konqueror")==-1  || 
		 navigator.userAgent.indexOf("Firefox")!=-1 || 
		 (navigator.userAgent.indexOf("Opera")==-1 && navigator.appVersion.indexOf("MSIE")!=-1)) && 
	     (docwidth>650 && docheight>500)
		) 
	{
		( width == 0 ) ? width = defaultimagewidth: '';
		( height == 0 ) ? height = defaultimageheight: '';
			
		width+=0;
		height+=0;
		defaultimageheight = height;
		defaultimagewidth = width;
	
		document.onmousemove=followmouse; 

		
		newHTML = '<div class="borderPreview" style="width:'+  width +'px;height:'+ height +'px"><div id="photoLoaderContainer"><div id="photoLoader"><div align="center">Image preview loading...</div><div id="photoLoaderBackground"><div id="progressBar"> </div></div></div></div>';
		//newHTML = newHTML + '<span class="titleH2">' + ' '+title + '</span>'
		
    	newHTML = newHTML + '<div class="previewTempLoading"><img onload="javascript:remove_loading();" src="' + imagename + '" border="0"></div>';
		newHTML = newHTML + '</div>'; 
		
		if(navigator.userAgent.indexOf("MSIE")!=-1 && navigator.userAgent.indexOf("Opera")==-1 ){
			newHTML = newHTML+'<iframe src="about:blank" scrolling="no" frameborder="0" width="'+width+'" height="'+height+'"></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-15;
	var docheight=document.all? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight);

	if (typeof e != "undefined"){
		if (docwidth - e.pageX < defaultimagewidth + 2*offsetfrommouse[0]){
			xcoord = e.pageX - xcoord - defaultimagewidth; // Move to the left side of the cursor
		} 
		else { xcoord += e.pageX; }
		
		if (docheight - e.pageY < defaultimageheight + 2*offsetfrommouse[1]){
			ycoord += e.pageY - Math.max(0,(2*offsetfrommouse[1] + defaultimageheight + e.pageY - docheight - truebody().scrollTop));
		} 
		else { ycoord += e.pageY; }

	} 
	else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < defaultimagewidth + 2*offsetfrommouse[0]){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - defaultimagewidth; // Move to the left side of the cursor
		} else { xcoord += truebody().scrollLeft+event.clientX }
		
		if (docheight - event.clientY < (defaultimageheight + 2*offsetfrommouse[1])){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(2*offsetfrommouse[1] + defaultimageheight + event.clientY - docheight));
		} 
		else { ycoord += truebody().scrollTop + event.clientY; }
	}
	gettrailobj().left=xcoord+"px";
	gettrailobj().top=ycoord+"px";
}

var t_id = setInterval(animate,20);
var pos=0;
var dir=2;
var len=0;

function animate()
{
	var elem = document.getElementById('progressBar');
	if(elem != null) {
		if (pos==0){ len += dir; }
		if (len>32 || pos>79){ pos += dir; }
		if (pos>79){ len -= dir; }
		if (pos>79 && len==0){ pos=0; }
		elem.style.left = pos;
		elem.style.width = len;
	}
}

function remove_loading() {
	this.clearInterval(t_id);
	var targelem = document.getElementById('photoLoaderContainer');
	targelem.style.display='none';
	targelem.style.visibility='hidden';
	var t_id = setInterval(animate,60);
}