function bekijk(on) {
	document.getElementById('block_flash').style.display = 'none';
	document.getElementById('block_woning').style.display = 'none';
	document.getElementById('block_kantoor').style.display = 'none';
	document.getElementById('block_gezondheidszorg').style.display = 'none';
	document.getElementById('block_retail').style.display = 'none';
	document.getElementById('block_computerruimte').style.display = 'none';
	document.getElementById('block_projectontwikkeling').style.display = 'none';
	document.getElementById('block_installateurs').style.display = 'none';
	
	document.getElementById('block_'+on).style.display = '';

	document.getElementById('tab_woning').className = "closed";
	document.getElementById('tab_kantoor').className = "closed";
	document.getElementById('tab_gezondheidszorg').className = "closed";
	document.getElementById('tab_retail').className = "closed";
	document.getElementById('tab_computerruimte').className = "closed";
	document.getElementById('tab_projectontwikkeling').className = "closed";
	document.getElementById('tab_installateurs').className = "closed";

	if(on != "flash") {
		document.getElementById('tab_' + on).className = "open";
	}
}

function content_bekijk(on) {
	document.getElementById('top-content').style.backgroundImage = "url(../assets/images/content_"+on+"_header.jpg)";
	document.getElementById('block_home').style.backgroundImage = "url(../assets/images/content_"+on+".jpg)";
}

function show(on) {
	var opened = document.getElementById('tab_' + on).className;
	if(opened == "open") {
		document.getElementById('block_woning').style.display = 'none';
		document.getElementById('block_kantoor').style.display = 'none';
		document.getElementById('block_gezondheidszorg').style.display = 'none';
		document.getElementById('block_retail').style.display = 'none';
		document.getElementById('block_computerruimte').style.display = 'none';
		document.getElementById('block_projectontwikkeling').style.display = 'none';
		document.getElementById('block_installateurs').style.display = 'none';
		document.getElementById('block_flash').style.display = '';
		document.getElementById('tab_woning').className = "closed";
		document.getElementById('tab_kantoor').className = "closed";
		document.getElementById('tab_gezondheidszorg').className = "closed";
		document.getElementById('tab_retail').className = "closed";
		document.getElementById('tab_computerruimte').className = "closed";
		document.getElementById('tab_projectontwikkeling').className = "closed";
		document.getElementById('tab_installateurs').className = "closed";
	} else {
		bekijk(on);
	} 
}