// test the browser to make sure it's ok
var browserName = navigator.appName;
var browserVer = parseInt(navigator.appVersion);
var browserOK = (((browserName == "Netscape") && (browserVer >= 3)) || 
	((browserName == "Microsoft Internet Explorer") && (browserVer >= 4)));

// delay between slides (in milliseconds)
var slideDelay = 10000;
// Index of the current slide

var rand_no = Math.ceil( slideDiv.length * Math.random() ); 

var curSlide = rand_no -1;

// var curSlide = -1;
// timeout id for the current setTimeout command
var curTimeout;

function showSlide() {
	if (browserOK) {
		// alert(slideDiv.length);
		
		curSlide = ((curSlide + 1) % slideDiv.length);
		
		docWrite = slideDiv[curSlide];
		
		docWrite += "<br><div class='scrollSmall style16'>(click above to learn more)</div>"; 
		
		if (slideDiv.length > 1) {
	
			// <div class='scrollSmall style1'>(click above to learn more)</div><br>
			
			docWrite += "<br><INPUT TYPE='BUTTON'  class='PrevNextText' VALUE='< prev event' onClick='goPrev()'>&nbsp;<INPUT TYPE='BUTTON' class='PrevNextText' VALUE='next event >' onClick='goNext()'>"; 
			
						
			// docWrite += "<br><br><div class='scrollSmall style1'>(click above to learn more)</div><font color = '#014b83'><a onClick='goPrev()'>< prev</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<a onClick='goNext()'>next ></a></font>"; 
		}  
				
		var divItem = document.getElementById('photo_main');
		divItem.innerHTML = docWrite; 
		//
	         curTimeout = setTimeout("showSlide()", slideDelay);
		
	} else {
		// show an error message for older browsers
		alert("This page requires Netscape 3.0+ or IE 4.0+");
	}
}

function goNext() {
	if (browserOK) {
	//
	     clearTimeout(curTimeout);
		showSlide();
	}
}

function goPrev() {
	if (browserOK) {
	//
		 clearTimeout(curTimeout);
		curSlide = (((curSlide - 2) + slideDiv.length) % slideDiv.length);
		showSlide();
	}
}