var defaultimageheight = 300;	// maximum image size.
var defaultimagewidth = 400;	// maximum image size.


var offsetfrommouse=[-50,30]; //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset
var displayduration=1; //duration in seconds image should remain visible. 0 for always.
var currentimageheight = 300;	// maximum image size.
var t_id = 0;
var currentimagewidth = 430;	// maximum image size.
var timer;

var pos=0;
var dir=2;
var len=0;

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="-5000px"
	clearTimeout(timer);
}

function showtrail(imagename,title,width,height){
	i = imagename
	t = ""
	w = 600
	h = 350
	timer = setTimeout("show('"+i+"',t,w,h);",200);
}
function show(imagename,title,width,height){
 
    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+=20
		height+=20
		defaultimageheight = height
		defaultimagewidth = width
	
		document.onmousemove=followmouse; 

		
		newHTML = '<div class="border_preview" style="width:'+  width +'px;height:'+ height +'px"><div id="loader_container"><div id="loader"><div align="center">Loading ...</div><div id="loader_bg"><div id="progress"> </div></div></div></div>';
		
    	newHTML = newHTML + '<div class="preview_temp_load"><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 XShift= -240
	var YShift= 0
	var XMargin=0
	var YMargin=0

	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(truebody().clientWidth>955){
        XMargin=(truebody().clientWidth-955)/2
    }
	if (typeof e != "undefined"){
		if (docwidth - e.pageX < currentimagewidth + 2*offsetfrommouse[0]){
			xcoord = e.pageX - xcoord - currentimagewidth; // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
		if (docheight - e.pageY < currentimageheight + 2*offsetfrommouse[1]){
			ycoord += e.pageY - Math.max(0,(2*offsetfrommouse[1] + currentimageheight + e.pageY - docheight - truebody().scrollTop));
		} else {
			ycoord += e.pageY;
		}

	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX - truebody().scrollLeft < (currentimagewidth + 2*offsetfrommouse[0]+7)){
			xcoord = -2*offsetfrommouse[0] + XShift - XMargin + truebody().scrollLeft + event.clientX - currentimagewidth; // Move to the left side of the cursor
		} else {
			xcoord = offsetfrommouse[0] + XShift - XMargin + truebody().scrollLeft + event.clientX
			//xcoord += truebody().scrollLeft-(truebody().clientWidth-955)/2+event.clientX
		}
		if (docheight - event.clientY < (currentimageheight + 2*offsetfrommouse[1]+23)){
		    // Move to the top side of the cursor
			//ycoord = offsetfrommouse[1] + event.clientY + truebody().scrollTop - Math.max(0,(2*offsetfrommouse[1] + currentimageheight + event.clientY - docheight));
			ycoord = -20-2*offsetfrommouse[1] + YShift - YMargin + truebody().scrollTop + event.clientY - currentimageheight//Math.max(0,(2*offsetfrommouse[1] + currentimageheight + event.clientY - docheight))
			//ycoord =0
		} else {
			//ycoord = offsetfrommouse[1] + YShift - YMargin + truebody().scrollTop + event.clientY;
			ycoord = offsetfrommouse[1] + YShift - YMargin + truebody().scrollTop + event.clientY
		}
	}
	//xcoord = offsetfrommouse[0] + XShift - XMargin + truebody().scrollLeft + event.clientX
	gettrailobj().left=xcoord+"px"
	gettrailobj().top=ycoord+"px"
	//gettrailobj().left = window.event.clientX+"px";
	//gettrailobj().top = window.event.clientY+truebody().scrollTop+"px";
}