/*
Simple Image Trail script- By JavaScriptKit.com
Visit http://www.javascriptkit.com for this script and more
This notice must stay intact
*/

var offsetfrommouse=[15,15]; //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 currentimageheight = 600; // maximum image size.
var currentswatchmin = 150; // swatch image minimum pix will blowup 200% otherwise show image.

if (document.getElementById || document.all){
document.write('<div id="trailimageid">');
document.write('</div>');
}

function gettrailobj(){
if (document.getElementById)
return document.getElementById("trailimageid").style
else if (document.all)
return document.all.trailimagid.style
}

function gettrailobjnostyle(){
if (document.getElementById)
return document.getElementById("trailimageid")
else if (document.all)
return document.all.trailimagid
}

function truebody(){
return (!window.opera && document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function showtrail(imagename,title,width,height,zoomimgwidth,zoomimgheight){
if (height > 0){ currentimageheight = height; }
document.onmousemove=followmouse;
theimage=new Image();
theimage.src=imagename;
theheight=theimage.height;
thewidth=theimage.width;
// if the actual image is 4 times bigger then swatch then scale down to double swatch size 
if (thewidth>height*4) {
  theheight=height*2;
  thewidth=width*2;
}

if ((thewidth>0) && ((thewidth<150) && (theheight<150))) {
  thewidth=thewidth*2;
	theheight=theheight*2;
}
if (thewidth==0) {
  sizehtml='';
} else {
	sizehtml=' width="' + thewidth + '" height="'+ theheight;
}
//edk debug	title='w=' + thewidth + ' h='+ theheight+' n='+imagename;
  newHTML = '<div style="padding: 5px; background-color: #FFF; border: 1px solid #888;text-align: center;">' + title;
  newHTML = newHTML + '<div align="center" style="padding: 2px 2px 2px 2px;"><img src="' + imagename + '" border="0"' + sizehtml + '"></div></div>';
  gettrailobjnostyle().innerHTML = newHTML;
  gettrailobj().visibility="visible";

}

function hidetrail(){
gettrailobj().visibility="hidden"
document.onmousemove=""
gettrailobj().left="-500px"
}

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 (document.all){
// gettrailobjnostyle().innerHTML = 'A = ' + truebody().scrollHeight + '<br>B = ' + truebody().clientHeight;
//} else {
// gettrailobjnostyle().innerHTML = 'C = ' + document.body.offsetHeight + '<br>D = ' + window.innerHeight;
//}

if (typeof e != "undefined"){
 if (docwidth - e.pageX < 300){
  xcoord = e.pageX - xcoord - 286; // Move to the left side of the cursor
 } else {
  xcoord += e.pageX;
 }
 if (docheight - e.pageY < (currentimageheight + 0)){
  ycoord += e.pageY - Math.max(0,(0 + currentimageheight + e.pageY - docheight - truebody().scrollTop));
 } else {
  ycoord += e.pageY;
 }

} else if (typeof window.event != "undefined"){
 if (docwidth - event.clientX < 300){
  xcoord = event.clientX + truebody().scrollLeft - xcoord - 286; // Move to the left side of the cursor
 } else {
  xcoord += truebody().scrollLeft+event.clientX
 }
 if (docheight - event.clientY < (currentimageheight + 0)){
  ycoord += event.clientY + truebody().scrollTop - Math.max(0,(0 - currentimageheight + event.clientY - docheight));
 } else {
  ycoord += truebody().scrollTop + event.clientY - currentimageheight;
 }
}

var docwidth=document.all? truebody().scrollLeft+truebody().clientWidth : pageXOffset+window.innerWidth-15
var docheight=document.all? Math.max(truebody().scrollHeight, truebody().clientHeight) : Math.max(document.body.offsetHeight, window.innerHeight)
 if(ycoord < 0) { ycoord = ycoord*-1; }
gettrailobj().left=xcoord+"px"
gettrailobj().top=ycoord+"px"
}