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,image_width){
	i = imagename
	t = title
	w = width
	h = height
	iw = image_width 
	timer = setTimeout("show('"+i+"',t,w,h,iw);",200);
}
function show(imagename,title,width,height,image_width){
 
    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; 
		while (title.search("_") != -1) 
		{
			title = title.replace("_"," ");
		}
		
		var our_width = image_width;

		if(our_width>400){
			pwidth = " width=400";
		}
		else{
			pwidth = " ";
		}
		
			newHTML = '<table cellpadding="0" cellspacing="0" style="border:1px solid #999" bgcolor="#f1f1f1">' ;
			newHTML = newHTML + '<tr><td style="padding-top:5px; padding-bottom:5px; padding-left:5px; padding-right:5px;" height="25" valign="top">';
			//newHTML = newHTML +	'<div class="border_preview" style="width:'+  width +'px;height:'+ height +'px"><div id="loader_container"><div id="loader"><div align="center"></div><div id="loader_bg"><div id="progress"></div></div></div></div>'	;	
			newHTML = newHTML + '<img onload="javascript:remove_loading();" src="' + imagename + pwidth +'" border="0" style="border:2px solid #999" name="imagine">';	
			newHTML = newHTML + '</td></tr><tr><td style="padding-top:5px; padding-bottom:0px; padding-left:5px; padding-right:5px" height="25" valign="top" align="center">';
			newHTML = newHTML + '<font color="#000000" size="1">' + ' <b> '+title + '</b></font></td></tr></table>'; 
			
			//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 xcoord=100
	var ycoord=-200



	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"

}