// Rollover Functions
function preload(images,prefx) {
         for (i =0;i<images.length;i++) {
               img = images[i];
               eval(img+" = new Image();\n"+img+". src='"+prefx+img+".gif';\n");
               eval(img+"2 = new Image();\n"+img+"2. src='"+prefx+img+"-over.gif';\n");

         }

}

function roll(img,sores) {
        eval("document.images."+img+".src = "+sores+".src;");
}

function unroll(img) {
         eval("document.images."+img+".src= "+img+".src;");
}

// Layer Functions 
var lastlayer;
function showlayer (layer) {
	if (lastlayer!=null) { hidelayer(lastlayer); }
	if (navigator.appName == 'Netscape'){
                if (navigator.appVersion.substring(0,3) < 5.0){
                        document.layers[layer].visibility="show"
                } else {
			document.getElementById(layer).style.visibility="visible";
		}
        }else{
        document.all[layer].style.visibility="visible";
        }
	//window.setTimeout('hide("'+layer+'")',5000);
	lastlayer=layer;
}

function hidelayer (layer) {
	if (lastlayer==null) { return; }
        if (navigator.appName == 'Netscape'){
                if (navigator.appVersion.substring(0,3) < 5.0){
                        document.layers[layer].visibility="hide"
                } else {
			document.getElementById(layer).style.visibility="hidden";
		}
        }else{
        document.all[layer].style.visibility="hidden";
        }
	lastlayer=null;
}

function clearlayers() {
	hidelayer(lastlayer);
}

// Window Functions 

function wopen(x,y,page) {

        x1 = window.open(page,"grumbleduke","toolbars=no, statusbars=no,width="+x+",innerwidth="+x+",height="+y+",innerHeight="+y+",scrolling=auto,scrollbars=yes,status=no,resizable=yes");
        x1.resizeTo(x,y);
        x1.focus();
}

function helpwin(topic) {
        wopen(475,225,"/expl/?topic="+topic);
}

function helpwin(topic,x,y) {
	if (x==null) { x = 475; }
	if (y== null) { y = 225; }
	
	wopen(x,y,"/expl?topic="+topic);
}

function helpwin_an(topic,anchor) {
	wopen(475,300,"/expl/?topic="+topic+"#"+anchor);
}

// DREAMWEAVER CHOMPS A DONKEYS BALLS

function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

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

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];}
}