var offsetfrommouse=[15,25]; //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 = 40; // maximum image size.
var defaultimagewidth = 40; // 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){
i = imagename
t = title
w = width
h = height
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 += 30
height += 55
defaultimageheight = height
defaultimagewidth = width

document.onmousemove=followmouse; 


newHTML = '<div class="border_preview" style="width:'+  width
+'px;height:'+ height +'px;border:0px;top:10px;"><div id="loader_container"><div id="loader"><div align="center">Loading Image...</div><div id="loader_bg"><div id="progress"> </div></div></div></div>';

newHTML = newHTML + '<img onload="javascript:remove_loading();" src="' + imagename + '" style="border:1px solid #000000" alt=""></div>';
newHTML = newHTML + ''; 

//if(navigator.userAgent.indexOf("MSIE")!=-1 &&
//navigator.userAgent.indexOf("Opera")==-1 ){
//newHTML = newHTML+'<iframe src="about:blank" scrolling="no" frameborder="1" 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"

}