function handleClick(whichClick) {
	if (whichClick == "show video") {
		hideLayer("image");
		hideLayer("nieuws");
		showLayer("video");
	}
	else if (whichClick == "hide video") {
		showLayer("image");
		hideLayer("nieuws");
		hideLayer("video");
	}
	else if (whichClick == "hide popup") {
		showLayer("image");
		hideLayer("video");
		hideLayer("nieuws");
		hideLayer("popup");		
	}
	else if (whichClick == "show popup") {
		hideLayer("image");
		hideLayer("video");
		hideLayer("nieuws");
		showLayer("popup");
	}
}