var arVersion = navigator.appVersion.split("MSIE")
var version = parseFloat(arVersion[1])

function correctPNG() // correctly handle PNG transparency in Win IE 5.5 and 6.
{
   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")
	      {
		     var imgID = (img.id) ? "id='" + img.id + "' " : ""
		     var imgClass = (img.className) ? "class='" + img.className + "' " : ""
		     var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
		     var imgStyle = "display:inline-block;" + img.style.cssText 
		     var imgAttribs = img.attributes;
		     for (var j=0; j<imgAttribs.length; j++)
			 {
			    var imgAttrib = imgAttribs[j];
			    if (imgAttrib.nodeName == "align")
			    {		  
			       if (imgAttrib.nodeValue == "left") imgStyle = "float:left;" + imgStyle
			       if (imgAttrib.nodeValue == "right") imgStyle = "float:right;" + imgStyle
			       break
			    }
             }
		     var strNewHTML = "<span " + imgID + imgClass + imgTitle
		     strNewHTML += " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
	         strNewHTML += "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
		     strNewHTML += "(src='" + img.src + "', sizingMethod='scale');\""
		     strNewHTML += " onmouseover=\"PNGswap('" + img.id + "');\" onmouseout=\"PNGswap('" + img.id +"');\""
		     strNewHTML += "></span>" 
		     img.outerHTML = strNewHTML
		     i = i-1
	      }
       }
   }
}

var submenuVisible = false;
var submenuTimeout;
function displaySubMenu(strMenu){
	if(document.getElementById('mainlevel_'+strMenu)){
		clearTimeout(submenuTimeout);
		submenuVisible = true;
		//document.getElementById('headerBG').style.visibility="hidden";
		document.getElementById('submenuPNG').style.visibility="visible";
		hideSubMenuTxt();
		document.getElementById('mainlevel_'+strMenu).style.display="block";
	}
}
function hideSubMenu(){
	if(submenuVisible==false){
		document.getElementById('submenuPNG').style.visibility="hidden";
		//document.getElementById('headerBG').style.visibility="visible";
		hideSubMenuTxt();
	}else{
		submenuVisible = false;
		submenuTimeout = setTimeout("hideSubMenu()",1000);
	}
}
function hideSubMenuTxt(){
	for( var i=1; i <= 10; i++ ){
		if( document.getElementById('mainlevel_'+i) ){
			document.getElementById('mainlevel_'+i).style.display="none";
		}
	}
}
function activateSubmenus(){
	if( document.getElementById && document.getElementsByTagName ){
		if( document.getElementById( 'mainlevel' ) ){
			var menu = document.getElementById( 'mainlevel' );
			var links = menu.getElementsByTagName( 'a' );
			for( var i=0; i < links.length; i++ ){
				links[i].id = 'menu_'+i;
				links[i].onmouseover = function(){ displaySubMenu(this.id.replace('menu_','')); }
				links[i].onmouseout = function(){ hideSubMenu(); }
			}
		}
		if( document.getElementById( 'menuSub' ) ){
			var menu = document.getElementById( 'menuSub' );
			var links = menu.getElementsByTagName( 'ul' );
			for( var i=0; i < links.length; i++ ){
				links[i].onmouseover = function(){
					clearTimeout(submenuTimeout);
					submenuVisible = true;
				};
				links[i].onmouseout = function(){
					hideSubMenu();
				};
			}
		}
	}
}