userAgent = window.navigator.userAgent;
browserVers = parseInt(userAgent.charAt(userAgent.indexOf("/")+1),10);
function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function findElement(n,ly) {
	if (browserVers < 4)		return document[n];
	var curDoc = ly ? ly.document : document;
	var elem = curDoc[n];
	if (!elem) {
		for (var i=0;i<curDoc.layers.length;i++) {
			elem = findElement(n,curDoc.layers[i]);
			if (elem) return elem;
		}
	}
	return elem;
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		var img;
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			img = null;
			if (document.layers) {
				img = findElement(changeImages.arguments[i],0);
			}
			else {
				img = document.images[changeImages.arguments[i]];
			}
			if (img) {
				img.src = changeImages.arguments[i+1];
			}
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		about_over = newImage("/acis/rad/images/nav/about-over.png");
		staff_over = newImage("/acis/rad/images/nav/staff-over.png");
		projects_over = newImage("/acis/rad/images/nav/projects-over.png");
		preloadFlag = true;
	}
} 
 
 var dispstatus = 1;

            function showhide (elemstr) {

               var elem = document.getElementById(elemstr);
               var dimg = document.getElementById(elemstr + "_img");

               if (elem.style.display == "none") {

                  elem.style.display = "block";
                  dimg.src = "/acis/rad/images/exp.gif";
               }
               else {

                  elem.style.display = "none";
                  dimg.src = "/acis/rad/images/cps.gif";
               }
            }

            function showhideall (longstr) {

               var elemarray = longstr.split('?');

               for (i = 0; i < elemarray.length; i++) {

                  var elem = document.getElementById(elemarray[i]);
                  var dimg = document.getElementById(elemarray[i] + "_img");

                  if (dispstatus) {

                     elem.style.display = "block";
                     dimg.src = "/acis/rad/images/exp.gif";
                  }
                  else {

                     elem.style.display = "none";
                     dimg.src = "/acis/rad/images/cps.gif";
                  }
               }

               dispstatus = dispstatus ? 0 : 1;
            }