/***********************************************
* Image Thumbnail viewer- © Dynamic Drive (www.dynamicdrive.com)
* Last updated Sept 26th, 03'. This notice must stay intact for use
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/

var ie  = document.all
var ns6 = document.getElementById && !document.all

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

function enlarge (which, e, position, imgwidth, imgheight) {
	if (ie || ns6) {
		crossobj = document.getElementById ? document.getElementById("showimage") : document.all.showimage
		if (position=="center") {
			pgyoffset = ns6 ? parseInt(pageYOffset) : parseInt(ietruebody().scrollTop)
			horzpos = ns6 ? pageXOffset+window.innerWidth/2-imgwidth/2 : ietruebody().scrollLeft+ietruebody().clientWidth/2-imgwidth/2
			vertpos = ns6 ? pgyoffset+window.innerHeight/2-imgheight/2 : pgyoffset+ietruebody().clientHeight/2-imgheight/2
			if (window.opera && window.innerHeight) //compensate for Opera toolbar
				vertpos=pgyoffset + window.innerHeight/2-imgheight/2
			vertpos=Math.max(pgyoffset, vertpos)
		}
		else {
			var horzpos = ns6 ? pageXOffset+e.clientX : ietruebody().scrollLeft + event.clientX
			var vertpos = ns6 ? pageYOffset+e.clientY : ietruebody().scrollTop + event.clientY
		}
		crossobj.style.left = horzpos+"px"
		crossobj.style.top = vertpos+"px"
		
		crossobj.innerHTML='<div align="left" id="dragbar"><span id="closetext" onClick="closepreview()">Fenster schliessen</span> </div><img src="'+which+'">'
		crossobj.style.visibility="visible"
		
		return false
	}
	else //if NOT IE 4+ or NS 6+, simply display image in full browser window
		return true
}

function closepreview () {
	crossobj.style.visibility="hidden"
}

function drag_drop (e) {
	if (ie && dragapproved) {
		crossobj.style.left = tempx + event.clientX - offsetx + "px"
		crossobj.style.top  = tempy + event.clientY - offsety + "px"
	}
	else if (ns6 && dragapproved) {
		crossobj.style.left = tempx + e.clientX - offsetx + "px"
		crossobj.style.top  = tempy + e.clientY - offsety + "px"
	}
	return false
}

function initializedrag (e) {
	if (ie && event.srcElement.id == "dragbar" || ns6 && e.target.id=="dragbar") {
		offsetx = ie ? event.clientX : e.clientX
		offsety = ie ? event.clientY : e.clientY
		
		tempx = parseInt(crossobj.style.left)
		tempy = parseInt(crossobj.style.top)
		
		dragapproved=true
		document.onmousemove=drag_drop
	}
}

document.onmousedown = initializedrag
document.onmouseup = new Function("dragapproved=false")