urlOpera = '/broadcast/operaMain.cgi';

if (document.images) {

	var button10_OFF = new Image();
	var button10_ON  = new Image();

	var button11_OFF = new Image();
	var button11_ON  = new Image();

	var button12_OFF = new Image();
	var button12_ON  = new Image();

	var button13_OFF = new Image();
	var button13_ON  = new Image();

	var button14_OFF = new Image();
	var button14_ON  = new Image();

	var button15_OFF = new Image();
	var button15_ON  = new Image();

	var button21_OFF = new Image();
	var button21_ON  = new Image();

	var button22_OFF = new Image();
	var button22_ON  = new Image();

	var button23_OFF = new Image();
	var button23_ON  = new Image();
  
	button10_OFF.src= "/images/site/home/metop_mainnav_01.gif";
	button10_ON.src	= "/images/site/home/metop_mainnav_01_roll.gif";

	button11_OFF.src= "/images/site/home/metop_mainnav_02.gif";
	button11_ON.src	= "/images/site/home/metop_mainnav_02_roll.gif";

	button12_OFF.src= "/images/site/home/metop_mainnav_03.gif";
	button12_ON.src	= "/images/site/home/metop_mainnav_03_roll.gif";

	button13_OFF.src= "/images/site/home/metop_mainnav_04.gif";
	button13_ON.src	= "/images/site/home/metop_mainnav_04_roll.gif";

	button14_OFF.src= "/images/site/home/metop_mainnav_05.gif";
	button14_ON.src	= "/images/site/home/metop_mainnav_05_roll.gif";

	button15_OFF.src= "/images/site/home/metop_mainnav_06.gif";
	button15_ON.src	= "/images/site/home/metop_mainnav_06_roll.gif";


	button21_OFF.src= "/images/site/sub/metop_leftnav_inter_01.gif";
	button21_ON.src	= "/images/site/sub/metop_leftnav_inter_01_roll.gif";

	button22_OFF.src= "/images/site/sub/metop_leftnav_inter_02.gif";
	button22_ON.src	= "/images/site/sub/metop_leftnav_inter_02_roll.gif";

	button23_OFF.src= "/images/site/sub/metop_leftnav_inter_03.gif";
	button23_ON.src	= "/images/site/sub/metop_leftnav_inter_03_roll.gif";
}

var rollover_OK = "no";
function readyToGo() {
	rollover_OK = "yes";

	// Activate the "activeSideButton"
	if(activeSideButton > 0){
		document.images["button" + activeSideButton].src = eval("button" + activeSideButton + "_ON.src");
	}

	// Activate the "activeTopButton"
	if(activeTopButton > 0){
		document.images["button" + activeTopButton].src = eval("button" + activeTopButton + "_ON.src");
	}
}

function showButton(num,state) {
	if (num != activeSideButton && num != activeTopButton){
    		if ((document.images) && (rollover_OK == "yes")) {
			document.images["button" + num].src = eval("button" + num + "_" + state + ".src");
		}
	}
}

// script to handle change of operas dropdown
function newPage(form){
	var option = form.options[form.selectedIndex].value;
	location.href = urlOpera + '?' + option;
}