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 < 7) && (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
              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
           }
        }
     }   
  }

var disappeardelay		= 750;			// Tijd in milisec.
var delayhide			= 'undifined';
var currentSubDiv		= '';
var dropDirection		= 'right';		// [right | bottom]
var offsetLeft			= 0;			// tussenruimte positie vanaf menu naar rechts
var offsetTop			= 0;			// tussenruimte positie vanaf menu naar beneden


// StyleSheet classes
var classMenuItemNormal			= 'menuitem';
var classMenuItemHover			= 'menuitemHover';
var classMenuItemIconNormal		= 'menuitemIcon';
var classMenuItemIconHover		= 'menuitemIconHover';
var classMenuItemTextNormal		= 'menuitemText';
var classMenuItemTextHover		= 'menuitemTextHover';


function submenuActive(pageId) {


	menuDiv = 'menu_'		+ pageId;
	SubDiv	= 'submenu_'	+ pageId;


	// Stylesheets toepassen
	changeClass(menuDiv, classMenuItemHover);
	changeClass(menuDiv + '_icon', classMenuItemIconHover);
	changeClass(menuDiv + '_text', classMenuItemTextHover);


	// Submenu
	if (currentSubDiv != ''){
		if (currentSubDiv != SubDiv){
			document.getElementById(currentSubDiv).style.visibility = 'hidden';
			currentSubDiv = '';
		}
	}

	clearhidemenu(delayhide);
	if (document.getElementById(SubDiv) && document.getElementById(menuDiv)) {
		
		if (dropDirection == 'right') {
			SubMenuoffsetLeft = offsetLeft + document.getElementById(menuDiv).offsetWidth;
			document.getElementById(SubDiv).style.left = (SubMenuoffsetLeft + document.getElementById(menuDiv).offsetLeft) + 'px';
			document.getElementById(SubDiv).style.top = (offsetTop + document.getElementById(menuDiv).offsetTop) + 'px';
		} else if (dropDirection =='bottom'){
			SubMenuoffsetTop = offsetTop + document.getElementById(menuDiv).offsetHeight;
			document.getElementById(SubDiv).style.top = (SubMenuoffsetTop + document.getElementById(menuDiv).offsetTop) + 'px';
			document.getElementById(SubDiv).style.left = (offsetLeft + document.getElementById(menuDiv).offsetLeft) + 'px';
		}

		document.getElementById(SubDiv).style.visibility = 'visible';
	}
}

 
 
 function submenuDeActive(pageId) {

	menuDiv = 'menu_' + pageId;
	SubDiv = 'submenu_' + pageId;

	// Stylesheets toepassen
	changeClass(menuDiv, classMenuItemNormal);
	changeClass(menuDiv + '_icon', classMenuItemIconNormal);
	changeClass(menuDiv + '_text', classMenuItemTextNormal);
	
	// Submenu 
	delayhidemenu(SubDiv);
	currentSubDiv = SubDiv;
}

function changeClass(objId,cssClass) {
	document.getElementById(objId).className				= cssClass;
}


function delayhidemenu(SubDiv){
	delayhide=setTimeout("document.getElementById(SubDiv).style.visibility='hidden'",disappeardelay);
}

function clearhidemenu(delayhide){
	if (delayhide != "undifined") {
		clearTimeout(delayhide);
	}
}