// Thumbnail image hover functions
var W3CDOM = (document.createElement && document.getElementsByTagName);

var imageThumbs = new Array();
//var mouseOuts = new Array();

var maxLargeImageWidth = "400";
var maxLargeImageHeight = "300";
var ThumbImageWidth = "98";
var ThumbImageHeight = "74";

window.onload = preloadThumbs;

function preloadThumbs()
{
	if (!W3CDOM) return;
	var nav = document.getElementById('imagesThumbs');
	if(typeof(nav)=='undefined' || nav == null) return;
	
	var imgs = nav.getElementsByTagName('img');
	for (var i=0;i<imgs.length;i++)
	{
		imgs[i].onmouseover = swapImage('image_large');
		//imgs[i].onmouseout = mouseGoesOut;
		//var suffix = imgs[i].src.substring(imgs[i].src.lastIndexOf('.'));
		imageThumbs[i] = new Image();
		imageThumbs[i].src = imgs[i].src;
		//imageThumbs[i] = new Image();
		//imageThumbs[i].src = imgs[i].src.substring(0,imgs[i].src.lastIndexOf('.')) + "_omo" + suffix;
		imgs[i].number = i;
		
		// Set size of thumbnails
		////imgs[i].width = ThumbImageWidth;
		////imgs[i].height = ThumbImageHeight;
		
		// Set up width and height for large image display
		if( imgs[i].width > imgs[i].height) {	// Landscape
			imageThumbs[i].setWidth = maxLargeImageWidth;
			imageThumbs[i].setHeight = imgs[i].height * maxLargeImageWidth / imgs[i].width;
		} else {	// Portrait
			imageThumbs[i].setHeight = maxLargeImageHeight;
			imageThumbs[i].setWidth = imgs[i].width * maxLargeImageHeight / imgs[i].height;
		}
		////imageThumbs[i].width = ThumbImageWidth;
		////imageThumbs[i].height = ThumbImageHeight;
	}
}
function swapImage() { //v3.0
	var i,j=0,x,a=swapLargeImage.arguments; // NSR: ImageName, index
	var index = 0;
	i=0; index=this.number;
	if ((x=MM_findObj(a[i]))!=null){
	   x.src=imageThumbs[index].src;
	   
	   // Set the width or height depending on the orientation
	   ////x.height = imageThumbs[index].setHeight;
	   ////x.width = imageThumbs[index].setWeight;
	}
}
function swapLargeImage() { //v3.0
  var i,j=0,x,a=swapLargeImage.arguments; // NSR: Image name, {Image usemap}, image src, orientation{portrait|landscape}, label
  var size;
  document.MM_sr=new Array; 
  //for(i=0;i<(a.length-2);i+=3) {	// Assume one set of arguments
	i=0;
   	if ((x=MM_findObj(a[i]))!=null){
	   document.MM_sr[j++]=x; 
	   if(!x.oSrc) {
		   x.oSrc=x.src;
	   }
	   x.src=a[i+2];
	   
		// Ignoring map setting here - seems to tur the image into an anchor link in firefox
		
	   // Set the width or height depending on the orientation
	   if( a[i+3] == "portrait") {
		   x.height = "300";
		   x.width = "225";
	   } else {
		   x.height = "300";
		   x.width = "400";
	   }
	   
	   // Update the label
	   labelID = a[i]+"_label";
	   label = a[i+4];
	   //alert('labelID='+labelID+'label='+label);
   	   if((l=MM_findObj(labelID))!=null){
		l.innerHTML = label;
	   }
	}
  //}
}


function MM_preloadImages() { //v3.0
  var d=document; 
  if(d.images){ 
  	if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; 
	for(i=0; i<a.length; i++) {
    	if (a[i].indexOf("#")!=0){ 
			d.MM_p[j]=new Image; 
			d.MM_p[j++].src=a[i];
		}
	}
  }
}



function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; 
  for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) {
	  x.src=x.oSrc;
  }
}

function MM_findObj(n, d) { //v4.01
  	var p,i,x;  
  	if(!d) d=document; 
  	if((p=n.indexOf("?"))>0&&parent.frames.length) {
		d=parent.frames[n.substring(p+1)].document; 
		n=n.substring(0,p);
	}
  	if(!(x=d[n])&&d.all) x=d.all[n]; 
	for (i=0;!x&&i<d.forms.length;i++) {
		x=d.forms[i][n];
	}
  	for(i=0;!x&&d.layers&&i<d.layers.length;i++) {
		x=MM_findObj(n,d.layers[i].document);
	}
  	if(!x && d.getElementById) x=d.getElementById(n); 
	return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; // NSR: Image name, Image usemap, image src
  document.MM_sr=new Array; 
  for(i=0;i<(a.length-2);i+=3) {
   	if ((x=MM_findObj(a[i]))!=null){
	   document.MM_sr[j++]=x; 
	   if(!x.oSrc) {
		   x.oSrc=x.src;
	   }
	   if( a[i+1].length > 0) {
	   	x.useMap=a[i+1];
	   } else {
	   	x.useMap='';
	   }
	   x.src=a[i+2];
	}
  }
}