function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

//use as a handle on the timeout loop  
var timeout; 
//variable to hold global opactiy          
var globalOpacity = 0;  
 
 //var imageNames = "homepageimages/GG4C7035-1.jpg homepageimages/J0193190032-1.jpg".split(" ");
var imageNames = new Array();  
imageNames[0] = ['homepageimages/fyp1_frontpage.jpg'];
imageNames[1] = ['homepageimages/GG4C7035-1.jpg'];
imageNames[2] = ['homepageimages/J0193190032-1.jpg'];
imageNames[3] = ['homepageimages/bioinformatics_inform_02-1.jpg'];
imageNames[4] = ['homepageimages/building-1.jpg'];
imageNames[5] = ['homepageimages/Champagne1-1.jpg'];
imageNames[6] = ['homepageimages/ComputeTYwinners08-1.jpg'];
imageNames[7] = ['homepageimages/dublin_iq_lecture_2005_12-1.jpg'];
imageNames[8] = ['homepageimages/embingraduation2007-1.jpg'];
imageNames[9] = ['homepageimages/healthinformatics-1.jpg'];
imageNames[10] = ['homepageimages/J0193190019-1.jpg'];
imageNames[11] = ['homepageimages/MECT_Graduation-1.jpg'];
imageNames[12] = ['homepageimages/Picture6-1.jpg'];
imageNames[13] = ['homepageimages/scisym-1.jpg'];
 
//next image index to be faded
var indexValue = Math.floor(Math.random()*imageNames.length-1)+1;
 
//variables for container/target
var containerID = 'container';
var targetID    = 'target';
var container   = null;
var target      = null;
 
function startPhoto() {
  if (!document.getElementById) return;
  //set references to container && target ** a href    
  container = document.getElementById(containerID);
  target = document.getElementById(targetID);
  setalpha(0) ;
  timeout = window.setTimeout("nextPhoto()", 4000);
}
 
function nextPhoto() {
	if (!document.getElementById) return; 
	// only one transition at a time, please
	clearTimeout(timeout); 
	//flip image and container
	switchContainer();    
	//load next image   
	target.src = imageNames[indexValue];
	//get new index differnet from current
	var newvalue = indexValue;
	while(newvalue == indexValue) {
	  newvalue = Math.floor(Math.random()*imageNames.length);
	}
	indexValue = newvalue;
	//fade image in
 	timeout = window.setTimeout("reveal('0')", 500);
}

function switchContainer() {
  if (!document.getElementById) return;
  //make container background current image
 	  container.style.backgroundImage = 'url(' + target.src + ')';    
  //make image 0
  setalpha(0) ;
}


function reveal(opacity) {
	if (!document.getElementById) return;
	if (document.getElementById && opacity <= 100 ) {
	  setalpha(opacity); 
	  opacity += 5;
	  //store globally for restart
	  globalOpacity = opacity;
	  //fade next step
	  timeout = window.setTimeout("reveal("+opacity+")", 100);
	} else {
	  //we are done .. load next photo in 5 seconds
	  timeout = window.setTimeout("nextPhoto()", 4000);
	  switchContainer();
	}
}
 
function setalpha(opacity) {
	if (document.getElementById ) {    
	  //fade next step based onbrowser compatibility
	  if (target.style.MozOpacity!=null) {
	     target.style.MozOpacity = (opacity/100) - 0.001; 
	  } else if (target.style.opacity!=null) {
	     target.style.opacity = opacity/100;
	  } else if (target.style.filter!=null) {
	     target.style.filter = "alpha(opacity=" + opacity + ")";
	 	  } else if (target.style.KhtmlOpacity!=null) {
	     target.style.KhtmlOpacity = opacity/100;
	 	  }
	}
}