var i = 1;

ad1= new Image();
ad1.src = "img/ad/intro_design.png";

ad2= new Image();
ad2.src = "img/ad/intro_web.png";

ad3= new Image();
ad3.src = "img/ad/intro_video.png";

ad4= new Image();
ad4.src = "img/ad/intro_class.png";

ad5= new Image();
ad5.src = "img/ad/intro_event.png";

links = new Array
links[1] = "http://www.mdc.edu/iac/learningResources/MediaServices/2007/design.asp"
links[2] = "http://www.mdc.edu/iac/learningResources/MediaServices/2007/web.asp" 
links[3] = "http://www.mdc.edu/iac/learningResources/MediaServices/2007/av.asp"
links[4] = "http://www.mdc.edu/iac/learningResources/MediaServices/2007/classroom.asp" 
links[5] = "http://www.mdc.edu/iac/learningResources/MediaServices/2007/event.asp" 

alt = new Array
alt[1] = "Design & Print"
alt[2] = "Web Design" 
alt[3] = "Audio & Video"
alt[4] = "Classroom Support" 
alt[5] = "Event Support" 

function adCycle()
{
	var time= new Date();
	hours= time.getHours();
	mins= time.getMinutes();
	secs= time.getSeconds();
	closeTime=hours*3600+mins*60+secs;
	closeTime+=7;	// Seconds until the next ad rotation
	
	Timer();
}

function Timer()
{
	var adNum = 5; // TOTAL # of Ad's
	var time= new Date();
	hours= time.getHours();
	mins= time.getMinutes();
	secs= time.getSeconds();
	curTime=hours*3600+mins*60+secs
	
		if (curTime>=closeTime)
		{
			if (i < adNum)
			{	
				i++;
				document.ad.src = eval("ad" + i + ".src");
			}
			else
			{
				i = 1;
				document.ad.src = eval("ad" + i + ".src");
			}

			adCycle();
		}
		else
		{
			window.setTimeout("Timer()",1000)
		}
}

function setURL()
{
	top.location = links[i]
}

function setALT()
{
	window.status = alt[i]
}