// Copyright The University of Auckland 2005
// Author Craig Housley, c.housley@auckland.ac.nz

	var num = 0

	function setBlinker() {
		setInterval("blink()", 1000);
	}
		
	if (getcookieval("sound=") != "on" && getcookieval("sound=") != "off") {
		var expdate = new Date();
		expdate.setTime(expdate.getTime() + (1000*3600*3) ); // 1000ms*3600s*3h = 3hr
		document.cookie = 'sound=on; expires='  + expdate.toGMTString() + '; path=/';
	}
	
	// sets the "scroll right" arrows flashing
	function blink() {
		vis = (++num % 2 == "0")? "visible" : "hidden"
		document.getElementById("blink").style.visibility = vis
	}
	
	function toggleSound(url) {
		var bool = (getcookieval("sound=") == "on")? "off": "on";
		
		var expdate = new Date();
		expdate.setTime(expdate.getTime() + (1000*3600*3) ); // 1000ms*3600s*3h = 3hr
		document.cookie = 'sound=' + bool + '; expires='  + expdate.toGMTString() + '; path=/';
		
		if (bool == "on") {
			document.getElementById("speaker").src = "../images/speaker_on.gif";
			document.getElementById("speaker").title = "turn off sound";
		}
		else {
			document.getElementById("speaker").src = "../images/speaker_off.gif";
			document.getElementById("speaker").title = "turn on sound";
			var url = ""
		}
		document.getElementById("soundDiv").innerHTML = "<object classid='clsid:d27cdb6e-ae6d-11cf-96b8-444553540000' codebase='http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0' width='1' height='1' id='libfxObj' align='middle'><param name='allowScriptAccess' value='sameDomain' /><param name='movie' value='" + url + "' /><param name='quality' value='high' /><embed id='libfx' src='" + url + "' quality='high' width='1' height='1' name='libfxEmbed' align='middle' allowScriptAccess='sameDomain' type='application/x-shockwave-flash' pluginspage='http://www.macromedia.com/go/getflashplayer' /></object>";
	}
	
	function startSound(url) {
		document.getElementById("soundDiv").innerHTML = "<object classid='clsid:d27cdb6e-ae6d-11cf-96b8-444553540000' codebase='http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0' width='1' height='1' id='libfxObj' align='middle'><param name='allowScriptAccess' value='sameDomain' /><param name='movie' value='" + url + "' /><param name='quality' value='high' /><embed id='libfx' src='" + url + "' quality='high' width='1' height='1' name='libfxEmbed' align='middle' allowScriptAccess='sameDomain' type='application/x-shockwave-flash' pluginspage='http://www.macromedia.com/go/getflashplayer' /></object>";
	}
	
	// cookie handling for navigation, keeping score in interview and toggling sound

	function getcookieval(offset) {
        var start = document.cookie.indexOf(offset)+offset.length
		var end = document.cookie.indexOf(";", start)
		if (end == -1) end = document.cookie.length
        return unescape(document.cookie.substring(start, end))
	}