// Tab navigation 

var timer1;
var selectedTab;
var tab_arr = new Array("tab_home","tab_pregnant","tab_heart","tab_health","tab_products","tab_faq");
// group : all checkboxes with class chb in parent div with id="groepsnaam"
	 
	 
function initTabNav() {
	if (document.getElementById) {
		timer1=setTimeout("",0);
		for ( var i=0; i<tab_arr.length; i++) {
			var o = document.getElementById(tab_arr[i]);
			if (o.className == "tab_lv1_sel") { selectedTab = o.id; break; }
		}
		initSub();
	}
}

function initSub() {
	if (document.getElementById) {
		clearTimeout(timer1);
		for ( var i=0; i<tab_arr.length; i++) {
			var lv2 = document.getElementById("sub"+tab_arr[i]);
			var lv1 = document.getElementById(tab_arr[i]);
			if (lv2.id == "sub"+selectedTab) { lv2.className = "tabs_lv2_sel"; lv2.style.display = "block"; lv1.className = "tab_lv1_sel" ; }
			else { lv2.style.display = "none"; lv1.className = "tab_lv1" ; }
		}
	}
}

function showSub(tab) {
	clearTimeout(timer1);
	if (document.getElementById) {
		for ( var i=0; i<tab_arr.length; i++) {
			
			var lv1 = document.getElementById(tab_arr[i]);
			var lv2 = document.getElementById("sub"+tab_arr[i]);
			if (lv1.id != selectedTab ) {
				
				if (lv2.id == "sub"+tab.id) { lv2.style.display = "block"; lv1.className = "tab_lv1_over" ; }
				else { lv2.style.display = "none"; lv1.className = "tab_lv1" ; }
				
				
				
			} else {
				lv2.style.display = "none";
				lv1.className = "tab_lv1";
				
			}
		}
	}	
}

function hideSub() {
	if (document.getElementById) { 
		timer1=setTimeout('initSub();',400);
	}
} 

function ct() {
	if (document.getElementById) {
		clearTimeout(timer1);
	}
}