var isDHTML = 0;
var isLayers = 0;
var isAll = 0;
var isID = 0;
 
if (document.getElementById) {isID = 1; isDHTML = 1;}
else {
    if (document.all) {isAll = 1; isDHTML = 1;}
    else {
        browserVersion = parseInt(navigator.appVersion);
    if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion == 4)) {isLayers = 1; isDHTML = 1;}
}}
 
function findDOM(objectID,withStyle) {
    if (withStyle == 1) {
    if (isID) { return (document.getElementById(objectID).style) ; }
    else {
      if (isAll) { return (document.all[objectID].style); }
    else {
      if (isLayers) { return (document.layers[objectID]); }
    };}
  }
  else {
    if (isID) { return (document.getElementById(objectID)) ; }
    else {
      if (isAll) { return (document.all[objectID]); }
    else {
      if (isLayers) { return (document.layers[objectID]); }
    };}
  }
} 



function setClass(objectID,newClass) {
	var dom = findDOM(objectID,0);
     dom.className = newClass;
};

var theSlide = 1;

function nextSlide() {
	// hide current slide
	var slide = findDOM("slide"+theSlide,0);
	slide.className = "hide";
	// advance to next slide and show
	theSlide++;
	var slide = findDOM("slide"+theSlide,0);
	if (slide == null) {
		theSlide = 1;
		var slide = findDOM("slide"+theSlide,0);
	}
	slide.className = "show";
}