var offsetfrommouse=[20,-120];
var defaultimageheight = 40;
var defaultimagewidth = 40;
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 showLayertrail(imagename,type,width,height){
	i = imagename
	t = type
	w = width
	h = height
	timer = setTimeout("showLayer('"+i+"','"+t+"',w,h);", 1);
}
function showLayer(imagename,type,width,height,txtID){

    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=0
		height=0
		defaultimageheight = height
		defaultimagewidth = width

		document.onmousemove=followmouse;

		newHTML = '';
		var what = '';
		t = type;

		if(t=='img'){
			what = '<img alt="' + imagename + '" src="' + imagename + '" border="0">';
		}else{
			//var text = "";
			//if(txtID){
			//	text = document.getElementById(txtID).innerHTML;
			//}
			//what = '<div style=" width: 400px; padding: 5px; color:#004398; background:#fff; "><b><font color="#000">Beschreibung</font></b><hr style="border:1px dotted #ccc;">'+text+'</div>';
			what = '<div style=" width: 400px; padding: 5px; color:#004398; background:#fff; "><b><font color="#000">Kurzbeschreibung</font></b><hr style="border:1px dotted #ccc;">'+imagename+'</div>';
		}
    	newHTML = newHTML + '<div class="preview_temp_load">' + what + '</div>';
		newHTML = newHTML + '';

		if(navigator.userAgent.indexOf("MSIE")!=-1 && navigator.userAgent.indexOf("Opera")==-1 ){
			newHTML = newHTML+'';
		}
		gettrailobjnostyle().innerHTML = newHTML;
		gettrailobj().display="block";
	}
}

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 < 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"
}