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

var offsetfrommouse=[25,25]; //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.

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){
	document.onmousemove=followmouse;
	newHTML = '<img src="' + imagename + '" />';    
	gettrailobjnostyle().innerHTML = newHTML;
	gettrailobj().display="block";
}

function hidetrail(){
	gettrailobj().innerHTML = "";
	gettrailobj().display="none"
	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 (document.all){
//		gettrailobjnostyle().innerHTML = 'A = ' + truebody().scrollHeight + '<br>B = ' + truebody().clientHeight;
//	} else {
//		gettrailobjnostyle().innerHTML = 'C = ' + document.body.offsetHeight + '<br>D = ' + window.innerHeight;
//	}

	if (typeof e != "undefined"){
		if (docwidth - e.pageX < 360){
			xcoord = e.pageX - xcoord - 225; // Move to the left side of the cursor
		} else {
			xcoord += e.pageX;
		}
//		if (docheight - e.pageY < (currentimageheight + 110)){
//			ycoord += e.pageY - Math.max(0,(110 + currentimageheight + e.pageY - docheight - truebody().scrollTop));
//		} else {
			ycoord += e.pageY;
//		}

	} else if (typeof window.event != "undefined"){
		if (docwidth - event.clientX < 360){
			xcoord = event.clientX + truebody().scrollLeft - xcoord - 225; // 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;
//		}
	}

	if(ycoord < 0) { ycoord = ycoord*-1; }
	gettrailobj().left=xcoord+"px"
        //alert(gettrailobjnostyle().style.offsetHeight);
	gettrailobj().top=parseInt(ycoord-224)+"px"

}

function getElementWidth(Elem) {
	if (ns4) {
		var elem = getObjNN4(document, Elem);
		return elem.clip.width;
	} else {
		if(document.getElementById) {
			var elem = document.getElementById(Elem);
		} else if (document.all){
			var elem = document.all[Elem];
		}
		if (op5) {
			xPos = elem.style.pixelWidth;
		} else {
			xPos = elem.offsetWidth;
		}
		return xPos;
	}
}