function openInitCat(){
			showBranch("branch0");
			swapSign("sign0")				
		}
		function showBranch(branch){
			var objBranch = document.getElementById(branch).style;
			if(objBranch.display=="block")
				objBranch.display="none";
			else
				objBranch.display="block";
		}
		function swapSign(sign){
			objSign = document.getElementById(sign);
			if(objSign.innerHTML=="")
				objSign.innerHTML=" o";
			else
				objSign.innerHTML="";
		}
		function toonDefault(el,defaultWaarde){
			if(el.value=='')el.value=defaultWaarde;
			}
		function verbergDefault(el,defaultWaarde){
			if(el.value==defaultWaarde)el.value='';
			}

		function allesIngevuld(){ 
			f=document.contact; 
			var feedback=""; 
			if(f.naam.value!=''&&f.naam.value!='naam'&&f.email.value!=''&&f.email.value!='email'){ 
				return true; 
			}else{ 
				if(f.naam.value==''||f.naam.value=='naam'){ 
						feedback+='naam\n'; 
				} 
				if(f.email.value==''||f.email.value=='email'){ 
						feedback+='email\n';	
				} 
				alert('deze velden moeten ingevuld worden:\n\n'+feedback); return false;
			}
		}
		function no_spam (user) {
		  locationstring = "mailto:" + user + "@blendid.nl";
		  window.location = locationstring;
		}