function changetab_grey(id) {

	tab_id = "tab_" + id;
	content_id = "tabbox_inner_" + id;
	
	document.getElementById("tab_klantenlogin").className = 'tab2';
	document.getElementById("tab_support").className = 'tab2';
	
	document.getElementById(tab_id).className = 'tab1 active';
	
	document.getElementById("tabbox_inner_klantenlogin").style.display = 'none';
	document.getElementById("tabbox_inner_support").style.display = 'none';
	
	document.getElementById(content_id).style.display = 'block';
	
}

function changetab_green(id) {

	tab_id = "tab_" + id;
	content_id = "tabbox_inner_" + id;
	
	document.getElementById("tab_laatstenieuws").className = 'tab2';
	document.getElementById("tab_rss").className = 'tab2';
	
	document.getElementById(tab_id).className = 'tab1 active';
	
	
	document.getElementById("tabbox_inner_laatstenieuws").style.display = 'none';
	document.getElementById("tabbox_inner_rss").style.display = 'none';
	
	document.getElementById(content_id).style.display = 'block';
}