var offsetfrommouse=[40,15];
var displayduration=0;
var defaultimageheight = 200;
var defaultimagewidth = 200;

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);",10);
}
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)) ) {
( width == 0 ) ? width = defaultimagewidth: '';
( height == 0 ) ? height = defaultimageheight: '';
width+=0
height+=0
defaultimageheight = height
defaultimagewidth = width
document.onmousemove=followmouse;
newHTML = '<div class="border_preview" style="width:'+  width +'px;height:'+ height +'px">';
newHTML = newHTML + '<div class="preview_temp_load"><img  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"
}