function findPosX(obj) { 
    var curleft = 0; 
    if (obj.offsetParent) { 
        while (obj.offsetParent) { 
            curleft += obj.offsetLeft; 
            obj = obj.offsetParent; 
        } 
    } else if (obj.x) 
        curleft += obj.x;          
    return curleft; 
} 

function indentMenu() {
	// Active offsetX is het id van de actieve main item
	// Wrapper offsetX is de center div
	var x = findPosX(document.getElementById('active'));
	var y = findPosX(document.getElementById('wrapper'));
	
	var obj = document.getElementById('indent');
	if(obj != null){
		// Does the ident exist, eg no subsub items, skip the indent 
		if ((document.all) && (navigator.userAgent.indexOf('Opera')== -1)) {		
			// IE of opera
			obj.style.marginLeft = (x-y)-20+"px";
		} else {
			// FF enz
			obj.style.paddingLeft = (x-y)-10+"px";
		}	
	}
}