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

var offsetfrommouse=[15,25]; //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset

var defaultimageheight = 40;	// maximum image size.
var defaultimagewidth = 40;	// maximum image size.

function gettrailobj(preview_id){
  if(preview_id)
  {
    preview_div = preview_id;
  }
  else
  {
    preview_div = 'preview_div';
  }
  
  if (document.getElementById && document.getElementById(preview_div)!=null)
  return document.getElementById(preview_div).style
}

function gettrailobjnostyle(preview_id){

  if(preview_id)
  {
    preview_div = preview_id;
  }
  else
  {
    preview_div = 'preview_div';
  }

  if (document.getElementById)
  return document.getElementById(preview_div)
}


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

function absPosition(obj) {
      var x = y = 0;
      while(obj) {
            x += obj.offsetLeft;
            y += obj.offsetTop;
            obj = obj.offsetParent;
      }
      return {x:x, y:y};
} 
                     
function hidetrail(preview_id){
  	gettrailobj(preview_id).display= "none";
  	document.onmousemove=""  	  	  	       
}

function showtrail(box_url, block_id,  img_id){  
   hidetrail(block_id);  
	 show(box_url, block_id, img_id);
	 
	 return false;
}

function show(box_url, block_id, img_id){
 
  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)) {
        
    img_obj = $(img_id);      
    mouseX = absPosition(img_obj).x+100;
    mouseY = absPosition(img_obj).y;
        
    gettrailobj(block_id).left=mouseX+"px";
    gettrailobj(block_id).top=mouseY+"px";
      		 				          
    newHTML = '<div id="loader_container'+block_id+'" style="background: #E9E9E9;"><img src="images/spinner.gif" hspace="5" vspace="5"></div>'; 
			      
		gettrailobjnostyle(block_id).innerHTML = newHTML;
		gettrailobj(block_id).display="block";				

    var log = $('loader_container'+block_id);
    //new Ajax(box_url, {method: 'get',update: log}).request();
    new Ajax.Updater('geo_box', url, {method: log} );
			
	}
}
 
function showtrailfm(box_url)
{
   showfm(box_url);	 
	 return false;
}

function showfm(box_url){
 
  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)) {
           
		document.onmousemove=followmouse; 				          
    newHTML = '<div id="loader_container" style="background: #E9E9E9;"><img src="images/spinner.gif" hspace="5" vspace="5"></div>'; 
				      
		gettrailobjnostyle('').innerHTML = newHTML;
		gettrailobj('').display="block";				

    var log = $('loader_container');

    new Ajax(box_url, {method: 'get',update: log}).request();
			
	}
}

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";
}