portfolio = new WddxRecordset();
col0 = new Array();
col0[0] = "Cornell.edu";
col0[1] = "Materials Science & Engineering Website";
col0[2] = "Cornell Law School";
col0[3] = "College of Human Ecology";
col0[4] = "School of Operations Research and Industrial Engineering";
col0[5] = "Center for Technology, Enterprise, and Commercialization";
col0[6] = "The Cornell Identity Site";
col0[7] = "The Journey: A Han Dynasty Tomb";
col0[8] = "Department of Biomedical Engineering";
col0[9] = "School of Chemical and Biomolecular Engineering";
col0[10] = "Vicos, Peru";
col0[11] = "CUinfo";
col0[12] = "Hans Bethe Lectures";
col0[13] = "Cornell\'s President Inauguration website";
col0[14] = "Cornell University Life Sciences";
col0[15] = "Undergraduate Admissions Office";
col0[16] = "Department of Education";
portfolio["title"] = col0;
col0 = null;
col1 = new Array();
col1[0] = "/iws2/cms/manage/portfolio/images/cornell_temp.jpg";
col1[1] = "/iws2/cms/manage/portfolio/images/mse_home.jpg";
col1[2] = "/iws2/cms/manage/portfolio/images/law_temp.jpg";
col1[3] = "/iws2/cms/manage/portfolio/images/che_temp.jpg";
col1[4] = "/iws2/cms/manage/portfolio/images/orie_home_2.jpg";
col1[5] = "/iws2/cms/manage/portfolio/images/cctec_home.jpg";
col1[6] = "/iws2/cms/manage/portfolio/images/id_home.jpg";
col1[7] = "/iws2/cms/manage/portfolio/images/tomb_home.jpg";
col1[8] = "/iws2/cms/manage/portfolio/images/bme_home.jpg";
col1[9] = "/iws2/cms/manage/portfolio/images/cheme_home.jpg";
col1[10] = "/iws2/cms/manage/portfolio/images/peru.jpg";
col1[11] = "/iws2/cms/manage/portfolio/images/cuinfo_2.jpg";
col1[12] = "/iws2/cms/manage/portfolio/images/bethe_head.jpg";
col1[13] = "/iws2/cms/manage/portfolio/images/inauguration_home.jpg";
col1[14] = "/iws2/cms/manage/portfolio/images/genomics_home.jpg";
col1[15] = "/iws2/cms/manage/portfolio/images/ugadmissions_home_2.jpg";
col1[16] = "/iws2/cms/manage/portfolio/images/dept_of_ed_home.jpg";
portfolio["homepage_image"] = col1;
col1 = null;

var i = 0;
var fading = false;

var bid = 'portfolio-homepage-image';
var tid = 'portfolio-homepage-image2';

function cycleNext(){
	if (fading) return false;
	fading = true;
	i = (i + 1) % portfolio.title.length;
	startFade();
	return false;
}
function cyclePrev(){
	if (fading) return false;
	fading = true;
	i = ((i==0)?portfolio.title.length:i)-1;
	startFade();
	return false;
}

function finishFade(){
	$(bid).src=portfolio.homepage_image[i];
	$(bid).alt=portfolio.title[i];
	$(bid).title=portfolio.title[i];

	setOpacity(tid, 0);	
	fading = false;
}

function startFade(){
	setOpacity(tid, 100);
	$(tid).zIndex = 2;

	$(tid).src=portfolio.homepage_image[i];
	$(tid).alt=portfolio.title[i];
	$(tid).title=portfolio.title[i];
	$(tid).style.display = 'block';
	crossFade(tid, 0);
}

// fades image in, then calls finishFade()
function crossFade(oid, opacity) {
	if (opacity < 100) {
		setOpacity(oid,opacity);
		if (opacity < 50)
			opacity += 10;
		else if (opacity < 75)
			opacity += 7;
		else
			opacity += 5;
		window.setTimeout("crossFade('"+ oid + "' ," +opacity+")",30);
	} else {
		finishFade();
	} 
	
}

function setOpacity(oid,opacity) {
	/* helper function to deal specifically with images and the cross-browser differences in opacity handling */
	var obj=$(oid);
	if (obj.style) {
		if (obj.style.MozOpacity!=null) {  
			/* Mozilla's pre-CSS3 proprietary rule */
			obj.style.MozOpacity = (opacity/100) - .001;
		} else if (obj.style.opacity!=null) {
			/* CSS3 compatible */
			obj.style.opacity = (opacity/100) - .001;
		} else if (obj.style.filter!=null) {
			/* IE's proprietary filter */
			obj.style.filter = "alpha(opacity="+opacity+")";
		}
	}
}