var current_header_tab = "";
var tab_count = 5;

header_interval = setInterval ("header_tab_interval ()", 4000); 

function set_header_tab (nr, clear) {
	
	// Clear interval on requist
	if (clear == true)
		clearInterval(header_interval);
	
	// Do the switching thinh
	var selected_tab = nr;
	
	for (var i=1; i<=tab_count; i++) {
		
	 	var tab_content_id = "ht"+i;
		var tab_content = document.getElementById(tab_content_id);
		
		if (tab_content) {

			// Load new tab content
			if (i == nr) {
			
				tab_content.style.display = "block";
				
				// Set class name of the tab
				var tab_id = "t"+i;
				var tab = document.getElementById(tab_id);
				current_header_tab.className = "";
				tab.className = "selected";
				current_header_tab = tab;	
			
			} else {
			
				tab_content.style.display = "none";
			}
		}
	}
}

current_active_tab = 1;

function header_tab_interval () {
	
	current_active_tab++;
	
	if (current_active_tab > tab_count)
		current_active_tab = 1;
		
	set_header_tab (current_active_tab);
}