//the following two arrays are used 
//for both the random image generation
//and the slide show.

//images array
var hpImage = new Array();
hpImage[0] = 'spring00.jpg' //academic mall
hpImage[1] = 'spring6.jpg' //technology
hpImage[2] = 'spring7.jpg' //anatomy
hpImage[3] = 'spring12.jpg' //golf
hpImage[4] = 'fall16.jpg' //superior edge tire
hpImage[5] = 'spring10.jpg' //climbing
hpImage[6] = 'spring9.jpg' //crew
hpImage[7] = 'spring1.jpg'	//lrc
hpImage[8] = 'spring5.jpg' //seaborg
hpImage[9] = 'spring4.jpg' //dining
hpImage[10] = 'spring8.jpg' //microscope
hpImage[11] = 'fall17.jpg' //superior edge
hpImage[12] = 'spring13.jpg' //theatre
hpImage[13] = 'spring3.jpg' //art

//captions array
var hpImageCaption = new Array();
hpImageCaption[0] = 'The academic mall is a great place to gather with friends between classes.'
hpImageCaption[1] = 'The challenges of the classroom are made easier by the abundance of technology at NMU.'
hpImageCaption[2] = 'Smaller class sizes allow for a personal and interactive learning experience.'
hpImageCaption[3] = 'Each spring the NMU golf team gets back into the swing of things.'
hpImageCaption[4] = 'Citizenship, one of the four edges in the <a href=\"http://www.nmu.edu/superioredge\">Superior Edge</a> program.'
hpImageCaption[5] = 'First-time climbers and experts can enjoy the challenges of the PEIF\'s climbing wall.'
hpImageCaption[6] = 'NMU club sports welcome athletes of all abilities.'
hpImageCaption[7] = 'Coffee is just one of the essential collegiate resources provided by the Learning Resource Center.'
hpImageCaption[8] = 'The greenhouse in the Seaborg Science Complex provides a glimpse of summer regardless of the season.'
hpImageCaption[9] = 'Good food and engaging conversation is always on the menu at the Wildcat Den.'
hpImageCaption[10] = 'Graduate research assistants frequently present their work at academic and professional conferences.'
hpImageCaption[11] = 'Learn to live a life that matters with the <a href=\"http://www.nmu.edu/superioredge\">Superior Edge</a>.'
hpImageCaption[12] = 'A blockbuster season is underway at NMU\'s Forest Roberts Theatre'
hpImageCaption[13] = 'NMU’s Art and Design building is an ideal home for your creativity.'

//these ALTs were used to stop the problem with links and alt text
var hpAltCheck = new Array();
hpAltCheck[0] = 'The academic mall is a great place to gather with friends between classes.'
hpAltCheck[1] = 'The challenges of the classroom are made easier by the abundance of technology at NMU.'
hpAltCheck[2] = 'Smaller class sizes allow for a personal and interactive learning experience.'
hpAltCheck[3] = 'Each spring the NMU golf team gets back into the swing of things.'
hpAltCheck[4] = 'Citizenship, one of the four edges in the Superior Edge program.'
hpAltCheck[5] = 'First-time climbers and experts can enjoy the challenges of the PEIF\'s climbing wall.'
hpAltCheck[6] = 'NMU club sports welcome athletes of all abilities.'
hpAltCheck[7] = 'Coffee is just one of the essential collegiate resources provided by the Learning Resource Center.'
hpAltCheck[8] = 'The greenhouse in the Seaborg Science Complex provides a glimpse of summer regardless of the season.'
hpAltCheck[9] = 'Good food and engaging conversation is always on the menu at the Wildcat Den.'
hpAltCheck[10] ='Graduate research assistants frequently present their work at academic and professional conferences.' 
hpAltCheck[11] ='Learn to live a life that matters with the Superior Edge.' 
hpAltCheck[12] ='A blockbuster season is underway at NMU\'s Forest Roberts Theatre' 
hpAltCheck[13] ='NMU’s Art and Design building is an ideal home for your creativity.' 

//end image arrays

//start random image on page load
var j = 0;
var p = hpImage.length;
/*
var preBuffer = new Array()
for (i = 0; i < p; i++){
   preBuffer[i] = new Image();
   preBuffer[i].src = "images/homepage/"+hpImage[i];
}
*/
var whichImage = Math.round(Math.random()*(p-1));

function showImage(){
   document.write('<img name="hpImage" src="images/homepage/'+hpImage[whichImage]+'" alt="'+hpAltCheck[whichImage]+'">');
}
function showCaption(){
   document.write(hpImageCaption[whichImage]);
}
// end random image on page load


//start slide show
var thePic = whichImage;

function goback() {
    if (document.images && thePic < 1) {
		thePic = p + 1;
	}
	thePic--
	document.hpImage.src='images/homepage/'+hpImage[thePic]
	document.getElementById('caption').innerHTML = hpImageCaption[thePic];
}

function goforward() {
    if (document.images && thePic == p-1) {
		thePic = -1;
	}
	thePic++
	document.hpImage.src='images/homepage/'+hpImage[thePic]
	document.hpImage.alt=hpImageCaption[thePic];
	document.getElementById('caption').innerHTML = hpImageCaption[thePic]+"&nbsp;&nbsp;";
}
//end slide show