slide = new Array();
	function cacheSlide(imgsrc,altText){
	slide[slide.length] = new Image();
	slide[slide.length-1].src = imgsrc;
	slide[slide.length-1].alt = altText;
	}
	
function setSlide(num) {
		
		// set image attributes		
		theImg=document.getElementById("slideShowImg");
		theImg.setAttribute("src",slide[num].src);
		theImg.setAttribute("alt",slide[num].alt);
		document.getElementById("slideShowTitle").innerHTML = slide[num].alt;
		
		// hide back/next buttons
		if (num==0) document.getElementById("slideButtonBack").style.display = "none";
		else document.getElementById("slideButtonBack").style.display = "inline";
		
		if (num > slide.length-2) document.getElementById("slideButtonNext").style.display = "none";
		else document.getElementById("slideButtonNext").style.display = "inline";
		}
	
	function slideShow(way) {
				
			if (way== "next") num = num+1;
						else 
			if (way == "back") num = num-1;

			setSlide(num);
		
	}