// JavaScript Scripts for the Catalog Functions Apr 2007 MKiD

//------------------------- functions to set up visual effects--------//
function setOpacity(obj, opacity) {
  opacity = (opacity == 90)?99.999:opacity;
  
  // IE/Win
  obj.style.filter = "alpha(opacity:"+opacity+")";
  
  // Safari<1.2, Konqueror
  obj.style.KHTMLOpacity = opacity/100;
  
  // Older Mozilla and Firefox
  obj.style.MozOpacity = opacity/100;
  
  // Safari 1.2, newer Firefox and Mozilla, CSS3
  obj.style.opacity = opacity/100;
}

// keep track of the current shown object
//var currThumb="";

function fadeOut(thumb,objId,opacity,img){
  if (document.getElementById) {
   var obj = document.getElementById(objId);
    if (opacity >= 0) {
      setOpacity(obj, opacity);
      opacity -= 5;
      window.setTimeout("fadeOut('"+thumb+"','"+objId+"',"+opacity+",'"+img+"')",1);
	  
    }
	// -----
	if (opacity == 0) { //actions for once the item has faded
	// turn off the currently hilited thumbnail
	var oldThumb=currThumb+"_sel";
	document.getElementById(oldThumb).style.display="none";
	// change the main image
	swapItem(img);
	window.setTimeout("fadeIn('"+thumb+"','"+objId+"','0')",20);

	}
  }
}

function fadeIn(thumb,objId,opacity){
  if (document.getElementById) {
   var obj = document.getElementById(objId);
    if (opacity <= 100) {
      setOpacity(obj, opacity);
      opacity += 5;
      window.setTimeout("fadeIn('"+thumb+"','"+objId+"',"+opacity+")", 1);
    }
	
	if (opacity >> 100) {
		//turn on the thumbnail indicator
		currThumb=thumb;
		var newThumb=currThumb+"_sel";
		document.getElementById(newThumb).style.display="block";
		return;
	}
  }
}

function swapItem(img){
	document.getElementById('catalogMainImg').src="admin/images/"+img;
	return;
}


//----------------------------------------------------------------------//

function swapCatalogImage(thumb,img){
	//tn29_summer_2007/
	fadeOut(thumb,'catalogMainImgDiv','100',img);
	//window.setTimeout("fadeOut('catalogMainImgDiv','100')",500);
	
	return;
}