// set the mouseover event handlers for each tab image in the tabs area

function tab_hi() {
	var e = this;
	var tab_name_parts = e.id.split('_', 2);
	var basename = tab_name_parts[0];

	if (currently_selected_tab_basename == basename)
		this.src = "/images/" + basename + "-sel-hi.jpg";
	else
		this.src = "/images/" + basename + "-hi.jpg";
}

function tab_lo() {
	var e = this;
	var tab_name_parts = e.id.split('_', 2);
	var basename = tab_name_parts[0];

	if (currently_selected_tab_basename == basename)
		this.src = "/images/" + basename + "-sel-lo.jpg";
	else
		this.src = "/images/" + basename + "-lo.jpg";
}


function tab_click() {
	if (currently_selected_tab_basename != "")
		document.getElementById(currently_selected_tab_basename + "_tab").src = "/images/" + currently_selected_tab_basename + "-lo.jpg";

	var e = this;
	var tab_name_parts = e.id.split('_', 2);
	var basename = tab_name_parts[0];

	currently_selected_tab_basename = basename;
	this.src = "/images/" + basename + "-sel-hi.jpg";
}

// set individual tab handler
function set_tab_mouse_handler(tab) {
	var e = document.getElementById(tab + "_tab");
	e.onmouseover = tab_hi;
	e.onmouseout = tab_lo;
	e.onclick = tab_click;
}

// set all tab handlers
function set_tab_mouse_handlers() {
	set_tab_mouse_handler("advertisers");
	set_tab_mouse_handler("publishers");
	set_tab_mouse_handler("partners");
	set_tab_mouse_handler("login");
	set_tab_mouse_handler("faq");
	set_tab_mouse_handler("tutorial");
	set_tab_mouse_handler("signup");
	set_tab_mouse_handler("contact");
}