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

var offsetfrommouse=[20,-20]; //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 currentimagewidth = 1; // maximum image size.
var currentimageheight = 1; // maximum image size.

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, description, showthumb, width, height){

  if (height > 0){
    currentimageheight = height;
  }
  if (width > 0){
    currentimagewidth = width;
  }

  document.onmousemove=followmouse;

  newHTML = '<div class="trailimagebox">';
  newHTML = newHTML + '<div class="trailtablediv"><table width="'+currentimagewidth+'" height="'+currentimageheight+'"><tr><td valign="bottom"><h3>loading...</h3></td></tr></table></div>';

  if (showthumb > 0){
    newHTML = newHTML + '<div class="trailimage"><img src="' + imagename + '" border="0"></div>';
  }

  newHTML = newHTML + '</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 (typeof e != "undefined"){
    if (docwidth - e.pageX -xcoord -6 <= currentimagewidth){
      xcoord = e.pageX - currentimagewidth - xcoord -1; // Move to the left side of the cursor
    } else {
      xcoord += e.pageX;
    }
    if (e.pageY - truebody().scrollTop + ycoord < (currentimageheight)){
      ycoord = truebody().scrollTop +6;
    } else {
      ycoord += e.pageY - currentimageheight +6;
    }

  } else if (typeof window.event != "undefined"){
    if (docwidth - event.clientX - xcoord -6 < currentimagewidth){
      xcoord = event.clientX + truebody().scrollLeft - xcoord - currentimagewidth; // Move to the left side of the cursor
    } else {
      xcoord += truebody().scrollLeft+event.clientX;
    }
    if (event.clientY + ycoord  < currentimageheight){
      ycoord = truebody().scrollTop +6;
    } else {
      ycoord += truebody().scrollTop + event.clientY - currentimageheight +6;
    }
  }

  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"
}