function hideSubmenu() {
 
  	try {	
		// geen submenu
		if ( ((document.getElementById('subnavigation').innerHTML) == "") || ((document.getElementById('subnavigation').innerHTML) == " ") ) {
		document.getElementById('subnavigation').style.display='none';
		 }
		else {
		setTimeout("resizeSubmenu()", 10);
		}
	}
	catch(e) {
	}
 }
 
function resizeSubmenu() {

  	try {	
		var newsletter_height = document.getElementById('newsletter').clientHeight;
		var subnav_height =  document.getElementById('subnavigation').clientHeight;
		
		// pas afmetingen submenu aan
			if ( newsletter_height > subnav_height ) { 
				document.getElementById('submenu').style.height=subnav_height+"px";
				document.getElementById('newsletter').style.display='none';
				}
			else {
				document.getElementById('submenu').style.height=document.getElementById('subnavigation').clientHeight+"px";
			}
		}
	catch(e) {
	}
 }