function toggleSearch(){
		if (document.all){
				if (document.all.SEA.style.visibility=="visible"){
				document.all.SEA.style.visibility='hidden'
				}
				else{
				document.all.SEA.style.visibility='visible'
				}
		}
		else if (document.getElementById && !document.all){
				if (document.getElementById('SEA').style.visibility=="visible"){
				document.getElementById('SEA').style.visibility='hidden'
				}
				else{
				document.getElementById('SEA').style.visibility='visible'
				}
			}
			else{
			alert('helaas uw browser ondersteund de zoekfunctie niet')
			}
	}