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"><div id="loader_container"><div id="loader"><div align="center">Load...</div><div id="loader_bg"><div id="progress"> </div></div></div></div>';
    		newHTML = newHTML + '<h2 class="title_h2">' + ' '+title + '</h2>'
    		
        	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 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"
   
   }