var slideshow_width='500px' 
var slideshow_height='400px' 
var pause=6000 //Slide time interval (2000=2 seconds)

var fadeimages=new Array()
    fadeimages[0]="http://www.cesca.centers.vt.edu/images/main_slide/08fallpicnic_1_1.jpg"
    fadeimages[1]="http://www.cesca.centers.vt.edu/images/main_slide/DrPartkLab.jpg"
    fadeimages[2]="http://www.cesca.centers.vt.edu/images/main_slide/DrSchaumont.jpg"
	fadeimages[3]="http://www.cesca.centers.vt.edu/images/main_slide/Dr_Park.jpg"


    


var preloadedimages=new Array()
    for (p=0;p<fadeimages.length;p++){
        preloadedimages[p]=new Image()
        preloadedimages[p].src=fadeimages[p]
}

var ie4=document.all
var dom=document.getElementById

if (ie4||dom)
    document.write('<div style="position:relative;width:'+slideshow_width+';height:'+slideshow_height+';overflow:hidden"><div  id="canvas0" style="position:absolute;width:'+slideshow_width+';height:'+slideshow_height+';top:0;left:0;filter:alpha(opacity=10);-moz-opacity:10"></div><div id="canvas1" style="position:absolute;width:'+slideshow_width+';height:'+slideshow_height+';top:0;left:0;filter:alpha(opacity=10);-moz-opacity:10;visibility: hidden"></div></div>')
    else
        document.write('<img name="defaultslide" src="'+fadeimages[0]+'">')

var curpos=10
var degree=10
var curcanvas="canvas0"
var curimageindex=0
var nextimageindex=1


function fadepic(){
    if (curpos<100){
        curpos+=10
    if (tempobj.filters)
        tempobj.filters.alpha.opacity=curpos
    else if (tempobj.style.MozOpacity)
        tempobj.style.MozOpacity=curpos/101
    }
    else{
        clearInterval(dropslide)
        nextcanvas=(curcanvas=="canvas0")? "canvas0" : "canvas1"
        tempobj=ie4? eval("document.all."+nextcanvas) : document.getElementById(nextcanvas)
        tempobj.innerHTML='<img src="'+fadeimages[nextimageindex]+'" alt="CESCA Group" name="SlideShow" width=500 height=400>'
        nextimageindex=(nextimageindex<fadeimages.length-1)? nextimageindex+1 : 0
        var tempobj2=ie4? eval("document.all."+nextcanvas) : document.getElementById(nextcanvas)
        tempobj2.style.visibility="hidden"
        setTimeout("rotateimage()",pause)
    }
}

function rotateimage(){
    if (ie4||dom){
        resetit(curcanvas)
    var crossobj=tempobj=ie4? eval("document.all."+curcanvas) : document.getElementById(curcanvas)
        crossobj.style.zIndex++
        tempobj.style.visibility="visible"
    var temp='setInterval("fadepic()",50)'
        dropslide=eval(temp)
        curcanvas=(curcanvas=="canvas0")? "canvas1" : "canvas0"
    }
    else
        document.images.defaultslide.src=fadeimages[curimageindex]
        curimageindex=(curimageindex<fadeimages.length-1)? curimageindex+1 : 0
}

function resetit(what){
    curpos=10
    var crossobj=ie4? eval("document.all."+what) : document.getElementById(what)
    if (crossobj.filters)
        crossobj.filters.alpha.opacity=curpos
    else if (crossobj.style.MozOpacity)
        crossobj.style.MozOpacity=curpos/101
}

function startit(){
    var crossobj=ie4? eval("document.all."+curcanvas) : document.getElementById(curcanvas)
        crossobj.innerHTML='<img src="'+fadeimages[curimageindex]+'" alt="CESCA Group" name="SlideShow" width=500 height=400>'
        rotateimage()
}

if (ie4||dom)
    window.onload=startit
    else
        setInterval("rotateimage()",pause)