/*
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 = 300;	// maximum image size.
var currentimagewidth = 200;	// 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 selectEmbeddedImage(element) {
  if (document.getElementById) {
    element.style.border ="1px solid #700025";
  } else if (document.all) {
    element.border ="1px solid #700025";
  }
}

function unselectEmbeddedImage(element) {
  if (document.getElementById) {
    element.style.border ="1px solid #dadfdb";
  } else if (document.all) {
    element.border ="1px solid #dadfdb";
  }
}


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

function showtrail(imagename, title, description, width, height) {
	if (height > 0){
		currentimageheight = height;
	}
	if (width > 0){
		currentimagewidth = width;
	}

	document.onmousemove=followmouse;

	newHTML = '<div>';
	// newHTML = newHTML + '<h2>' + title + '</h2>';
	newHTML = newHTML + '<strong>' + description + '</strong>';
	newHTML = newHTML + '<div class="image" style="width: ' + width + 'px; height: ' + height + 'px;">';
	newHTML = newHTML + '<span><p class="tight">Bild wird geladen ...</p></span>';
	newHTML = newHTML + '<img src="' + imagename + '" />';
	newHTML = newHTML + '</div>';

	newHTML = newHTML + '</div>';

	gettrailobjnostyle().innerHTML = newHTML;
	gettrailobj().width=(currentimagewidth)+"px";

	gettrailobj().visibility="visible";
}


function hidetrail(){
	gettrailobj().visibility="hidden";
	document.onmousemove="";
	gettrailobj().top="-9999px";
	gettrailobj().left="-9999px";
}

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 < (currentimagewidth+30)){
			xcoord = e.pageX - xcoord - currentimagewidth - 10; // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
	
	var scrollTop = window.pageYOffset;
//truebody().scrollTop

    if (docheight - e.pageY < (currentimageheight+110)){
			ycoord += e.pageY - Math.max(0, (110 + currentimageheight + e.pageY - docheight - scrollTop));
		} else {
			ycoord += e.pageY;
		}
	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < (currentimagewidth+30)){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - currentimagewidth-10; // Move to the left side of the cursor
		} else {
			xcoord += truebody().scrollLeft+event.clientX
		}
		if (docheight - event.clientY < (currentimageheight + 110)){
			ycoord += event.clientY + truebody().scrollTop - Math.max(0,(110 + currentimageheight + event.clientY - docheight));
		} else {
			ycoord += truebody().scrollTop + event.clientY;
		}
	}
	
	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";
}