/*
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 = 360;	// maximum image size.
var currentimagewidth = 510;

if (document.getElementById || document.all){
	document.write('<div id="trailimageid" style="position:absolute;z-index:9;">');
	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,title,description,height,width){
	if (height > 0){
		currentimageheight = height;
	}
	if (width > 0){
		currentimagewidth = width;
	}

	document.onmousemove=followmouse;

	/*newHTML = '<div style="padding: 5px; background-color: #FFF; border: 1px solid #888;">';*/
	newHTML = '<div id="imagePop">';
	newHTML = newHTML + '<div class="imagePopHeader"><h2>' + title + '</h2></div><br/>';
	newHTML = newHTML + description + '<br/>';

	newHTML = newHTML + '<div align="center" style="padding: 8px 2px 2px 2px;">';
	newHTML = newHTML + '<img src="' + imagename + '" border="0"></div>';

	newHTML = newHTML + '</div>';
	gettrailobjnostyle().innerHTML = newHTML;
	gettrailobj().display="inline";
	gettrailobj().position="absolute";
	
}



function hidetrail(){
	gettrailobj().innerHTML = " ";
	gettrailobj().display="none"
	document.onmousemove=""
	gettrailobj().left="-1000px"

}

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 < currentimagewidth)
		{
		    rightside = docwidth - e.pageX -currentimagewidth ;
		    leftside= e.pageX - xcoord - currentimagewidth-10;
		    
		    xcoord += e.pageX;  
		    switch (true)
		    {
		        case leftside>0:
		           xcoord = leftside;
		           break; 
		        case (e.pageX > (docwidth/2)):
		           xcoord = leftside;
		           break; 
		    }
		    
//		        default:
//		          xcoord += e.pageX;  
		    
		    //		        case (Math.abs(leftside)>Math.abs(rightside)):
//		           xcoord = leftside;
//		           break; 

    		    
		} 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 < currentimagewidth){
			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;
		}
	}

	if(ycoord < 0) { ycoord = ycoord*-1; }
	gettrailobj().left=xcoord+"px"
	gettrailobj().top=ycoord+"px"

}