var offsetfrommouse=[10,10]; //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 = 400;	// maximum image size.
var padding=10; // padding must by larger than specified div padding in stylessheet

// Global variables for sizes of hoverimg
// Defined in "showtrail()", used in "followmouse()"
var zoomimg_w=0;
var zoomimg_h=0;

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

function getObjEx(name) {
  if (document.getElementById) {
  	  this.obj = document.getElementById(name);
    this.style = document.getElementById(name).style;
  } else if (document.all) {
    this.obj = document.all[name];
    this.style = document.all[name].style;
  } else if (document.layers) {
    this.obj = document.layers[name];
    this.style = document.layers[name];
  }
}

function gettrailEx(){
  return new getObjEx("trailimageid");
}

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

function showtrailEx(imagename,title,oriwidth,oriheight,zoomimgwidth,zoomimgheight, image, startx, starty, startw, starth){
	zoomimg_w=zoomimgwidth;
	zoomimg_h=zoomimgheight;
  //if (oriwidth > 0){ offsetfrommouse[0] = oriwidth; }
  //if (oriheight > 0){ offsetfrommouse[1] = -1 *(zoomimgheight-oriheight)/2 - 40; }
  // alert (offsetfrommouse[0] + "," + offsetfrommouse[1]);
  if (zoomimgheight > 0){ currentimageheight = zoomimgheight; }
  trailobj = gettrailEx().obj;
  trailobj.style.width=(zoomimgwidth+(2*padding))+"px";
  trailobj.style.height=(zoomimgheight+(2*padding))+"px";
  trailobj.setAttribute("startx", startx);
  trailobj.setAttribute("starty", starty);
  trailobj.setAttribute("startw", startw);
  trailobj.setAttribute("starth", starth);
  trailobj.setAttribute("imagename", imagename);
  trailobj.setAttribute("imgtitle", title);
  document.onmousemove=followmouseEx;
}

function hidetrailEx(){
  trailstyle = gettrailEx().style;
  trailstyle.visibility = "hidden";
  document.onmousemove = "";
  trailstyle.left = "-2000px";
  trailstyle.top = "-2000px";
}

function followmouseEx(e){

  var xcoord=offsetfrommouse[0];
  var ycoord=offsetfrommouse[1];

  var docwidth=document.all? truebodyEx().scrollLeft+truebodyEx().clientWidth : pageXOffset+window.innerWidth-15;
  var docheight=document.all? Math.min(truebodyEx().scrollHeight, truebodyEx().clientHeight) : Math.min(window.innerHeight);

  //if (document.all){
  //	trail.obj.innerHTML = 'A = ' + truebodyEx().scrollHeight + '<br>B = ' + truebodyEx().clientHeight;
  //} else {
  //	trail.obj.innerHTML = 'C = ' + document.body.offsetHeight + '<br>D = ' + window.innerHeight;
  //}
  var relativeX = null;
  var relativeY = null;
	
  if (typeof e != "undefined"){
    if ((typeof e.layerX != "undefined") && (typeof e.layerY != "undefined")) {
      relativeX = e.layerX;
      relativeY = e.layerY;
    } else if ((typeof e.x != "undefined") && (typeof e.y != "undefined")) {
      relativeX = e.x;
      relativeY = e.y;
    }

    if (docwidth - e.pageX < zoomimg_w + (1 * padding)) {
      xcoord = e.pageX - xcoord - zoomimg_w - (1 * offsetfrommouse[0]);
    } else {
      xcoord += e.pageX;
    }

   ycoord = 150;

  } else if (typeof window.event != "undefined"){
    if ((typeof event.x != "undefined") && (typeof event.y != "undefined")) {
      relativeX = event.x;
      relativeY = event.y;
    } else if ((typeof event.offsetX != "undefined") && (event.offsetY != "undefined")) {
      relativeX = event.offsetX;
      relativeY = event.offsetY;
    }

    if (docwidth - event.clientX < zoomimg_w + (1 * padding)) {
      // set image to left of cursor
      xcoord = event.clientX - xcoord - zoomimg_w - (1 * offsetfrommouse[0]);
    } else {
      // set image to right of cursor
      xcoord += truebodyEx().scrollLeft+event.clientX;
    }

   ycoord = 150;

  }

  trail = gettrailEx();
  startx    = trail.obj.getAttribute("startx");
  starty    = trail.obj.getAttribute("starty");
  startw    = trail.obj.getAttribute("startw");
  starth    = trail.obj.getAttribute("starth");
  imagename = trail.obj.getAttribute("imagename");
  title     = trail.obj.getAttribute("imgtitle");

  // calculate and set position BEFORE switching to visible
  var docwidth=document.all? truebodyEx().scrollLeft+truebodyEx().clientWidth : pageXOffset+window.innerWidth-15;
  var docheight=document.all? Math.max(truebodyEx().scrollHeight, truebodyEx().clientHeight) : Math.max(document.body.offsetHeight, window.innerHeight);
  if(ycoord < 0) { ycoord = ycoord*-1; }
  if ((trail.style.left == "-2000px") || (trail.style.left == "")) { trail.style.left=xcoord+"px"; }
  if ((trail.style.top == "-2000px") || (trail.style.top == "")) { trail.style.top=ycoord+"px"; }

   // ADDED - DH
   if (ycoord + 332 >= docheight){
      ycoord = docheight - 375;
   }

  trail.style.left=xcoord+"px";
  trail.style.top=ycoord+"px";

//	alert (trail.style.left+","+trail.style.top);

  if (trail.style.visibility != "visible") {
    if (((relativeX == null) || (relativeY == null)) ||
      ((relativeX >= startx) && (relativeX <= (startx + startw))
      && (relativeY >= starty) && (relativeY <= (starty + starth)))){
      newHTML = '<div style="z-index:9999;position:absolute;' +
                'filter:progid:DXImageTransform.Microsoft.Alpha( Opacity=100, FinishOpacity=90, Style=2, StartX=0,  FinishX=100, StartY=0, FinishY=100)">' +
                '<h1>' + title + '</h1>';
      newHTML = newHTML + '<img style="z-index:9999;" src="' + imagename + '" height="498px" width="372px"></div>';
      trail.obj.innerHTML = newHTML;
      trail.style.visibility="visible";
    }
  }
}