var fading;

function fadeOutEl(el){
	clearTimeout(fading);
	changeOpac(95, el);
	opacity(el, 95, 0, 400);	
}
function fadeInEl(el){
	clearTimeout(fading);
	changeOpac(0, el);
	opacity(el, 0, 95, 400);	
}

opacTimeoutAr = new Array();
function opacity(id, opacStart, opacEnd, millisec) {
    //speed for each frame
    var speed = Math.round(millisec / 100);
    var timer = 0;
	
    //determine the direction for the blending, if start and end are the same nothing happens
    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
			if(opacTimeoutAr[i]){
				clearTimeout(opacTimeoutAr[i]);
			}
           opacTimeoutAr[i] = setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
			if(opacTimeoutAr[i]){
				clearTimeout(opacTimeoutAr[i]);
			}
            opacTimeoutAr[i] = setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
    var object = getElementObject(id).style;
	
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
	
	if(opacity==0){
	object.visibility="hidden";
	object.display="none";
	}else{
	object.visibility="visible";
	object.display="block";
	}
	if(id=='divCursor'){
	mapOverOpac=opacity;
	}
} 

function shiftOpacity(id, millisec) {	
    if(fadeOut == false) {
        opacity(id, 0, 100, millisec);
		fadeOut=true;
    } else {
        opacity(id, 100, 0, millisec);
		fadeOut=false;
    }
}

function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6.
{
   var arVersion = navigator.appVersion.split("MSIE")
   var version = parseFloat(arVersion[1])
   if ((version >= 5.5) && (document.body.filters)) 
   {
      for(var i=0; i<document.images.length; i++)
      {
         var img = document.images[i];
         var imgName = img.src.toUpperCase()
         if (imgName.substring(imgName.length-3, imgName.length) == "PNG" && imgName!=="transparent.png")
         {
            var imgID = (img.id) ? "id='" + img.id + "' " : ""
            var imgClass = (img.className) ? "class='" + img.className + "' " : ""
            var imgTitle = (img.title) ? "title='" + img.title + "' " : "alt='" + img.alt + "' "
            var imgStyle = "display:inline-block;" + img.style.cssText 
			
            if (img.align == "left") imgStyle = "float:left;" + imgStyle
            if (img.align == "right") imgStyle = "float:right;" + imgStyle
            if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
            var strNewHTML = "<span " + imgID + imgClass + imgTitle
            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
            img.outerHTML = strNewHTML
            i = i-1
         }
      }
   }    
}