// Random image function and display scripts
// Modified from the Homepage script
// Built by Jacob Dolan, jake@montana.edu, Communications and Public Affairs
// For the College of Arts and Architecture
// Modified 06/05/2007

var num=0;
var image="";
var numLink="";
function Randum(N) { return  (N*(Math.random()%1))|0 }
				
function displayImage()
{
	// input to Randum is number of images - returns 0-N, so num must be incremented 
	num = Randum(4);
	num++;	 
	
	if (num == 1) {
	  altim="Department of Architecture";
	  numLink="http://www.arch.montana.edu/";
	}
	else if (num == 2) {
	  altim="Department of Music";
	  numLink="http://www.montana.edu/music/";
	}
	else if (num == 3) {
	  altim="School of Film and Photography";
	  numLink="http://sfp.montana.edu/";
	}
	else if (num == 4) {
	  altim="School of Art";
	  numLink="http://www.montana.edu/wwwart/";
	}
	
	document.write("<a href=\"\" onClick=\"this.href=rotateLink()\"><!-- Begin Random Image --><img name=\"header\" src=\"http://www.montana.edu/wwwdt/images/aabanner" + num + ".jpg\"  width=\"590\" height=\"256\" border=\"0\" /><!-- End Random Image --></a>");
	cycle();
}
function rotateLink() {
	if (num == 1) {
	  numLink="http://www.arch.montana.edu/";
	}
	else if (num == 2) {
	  numLink="http://www.montana.edu/music/";
	}
	else if (num == 3) {
	  numLink="http://sfp.montana.edu/";
	}
	else if (num == 4) {
	  numLink="http://www.montana.edu/wwwart/";
	}
	return numLink;
}

function cycle() {
	if (++num > 4) num=1;
    loadnum();
    document.header.src = image;
	window.setTimeout('cycle();',5000);
}
function loadnum() {
	image="http://www.montana.edu/wwwdt/images/aabanner" + num + ".jpg";
	if (num == 1) {
	  numLink="http://www.arch.montana.edu/";
	}
	else if (num == 2) {
	  numLink="http://www.montana.edu/music/";
	}
	else if (num == 3) {
	  numLink="http://sfp.montana.edu/";
	}
	else if (num == 4) {
	  numLink="http://www.montana.edu/wwwart/";
	}
}