/*	Rollover functions

	These function used to manage drop down menus on each page.
*/

sM = {
 init: function() {
   var uls = document.getElementsByTagName('ul');
   for (var u = 0; u < uls.length; u++) {
     if (uls[u].className.search(/\bslidingmenu\b/) == -1) continue;
     var lis = uls[u].getElementsByTagName('li');
     for (var i = 0; i < lis.length; i++) {
       var node = lis[i];
       if (node.nodeName.toLowerCase() == 'li' &&
           node.getElementsByTagName('ul').length > 0) {
         sM.addEvent(node, 'mouseover', sM.getMoverFor(node), false);
         sM.addEvent(node, 'mouseout', sM.getMoutFor(node), false);
         node.getElementsByTagName('a')[0].className += ' subheader';
         node.isIn = false;
       }
     }
   }
 },

 getMoverFor: function(node) {
   return function(e) { sM.mover(e, node); };
 },

 getMoutFor: function(node) {
   return function(e) { sM.mout(e, node); };
 },

 mover: function(e, targetElement) {
   var el = window.event ? targetElement : e ? e.currentTarget : null;
   if (!el) return;
   clearTimeout(el.outTimeout);
   if (!el.isIn) {
     for (var i = 0; i < el.childNodes.length; i++) {
       var node = el.childNodes[i];
       if (node.nodeName.toLowerCase() == 'ul') {
         // Stop current animation
         clearInterval(node.intervalID);
         // Assign initial visible area
         node.clippingRectangle = [0, 0, 4, 0];
         // Save full width and height
         node.style.display = 'block';
         node.savedOW = node.offsetWidth;
         node.savedOH = node.offsetHeight;
         node.style.display = 'none';
         // Start animation

node.intervalID = setInterval(function() { sM.showMenu(node); }, 10);

         break;
       }
     }
   }
   el.isIn = true;
   el.className += '';   // Force IE to recompute styles
 },

 mout: function(e, targetElement) {
   var el = window.event ? targetElement : e ? e.currentTarget : null;
   if (!el) return;
   el.outTimeout = setTimeout(function() { sM.mout2(el); }, 300);
 },

 mout2: function(el) {
   for (var i = 0; i < el.childNodes.length; i++) {
     var node = el.childNodes[i];
     if (node.nodeName.toLowerCase() == 'ul') {
       // Stop current animation
       clearInterval(node.intervalID);
       // Start animation

node.intervalID = setInterval(function() { sM.hideMenu(node); }, 10);

       break;
     }
   }
   el.isIn = false;
 },

 showMenu: function(el) {
   el.clippingRectangle[1] += 200;
   if (el.clippingRectangle[1] >= el.savedOW) {
     el.clippingRectangle[1] = el.savedOW;
     el.clippingRectangle[2] += 10;
     if (el.clippingRectangle[2] >= el.savedOH) {
       el.clippingRectangle[2] = el.savedOH;
       clearInterval(el.intervalID);
       // reset the clip: browser-specific
       if (document.all && !window.opera) {
         el.style.clip = 'rect(auto)';
       } else {
         el.style.clip = '';
       }
       return;
     }
   }
   el.style.clip = 'rect(' + el.clippingRectangle.join('px ') + 'px)';
   el.style.display = 'block';
 },

 hideMenu: function(el) {
   el.clippingRectangle[2] -= 10;
   if (el.clippingRectangle[2] <= 4) {
     el.clippingRectangle[2] = 4;
     el.clippingRectangle[1] -= 200;
     if (el.clippingRectangle[1] <= 0) {
       clearInterval(el.intervalID);
       // reset the clip: browser-specific
       if (document.all && !window.opera) {
         el.style.clip = 'rect(auto)';
       } else {
         el.style.clip = '';
       }
       el.style.display = 'none';
       return;
     }
   }
   el.style.clip = 'rect(' + el.clippingRectangle.join('px ') + 'px)';
 },

 addEvent: function(elm, evType, fn, useCapture) {
   // cross-browser event handling for IE5+, NS6 and Mozilla
   // By Scott Andrew
   if (elm.addEventListener) {
     elm.addEventListener(evType, fn, useCapture);
     return true;
   } else if (elm.attachEvent) {
     var r = elm.attachEvent('on' + evType, fn);
     EventCache.add(elm, evType, fn);
     return r;
   } else {
     elm['on' + evType] = fn;
   }
 }
};

sM.addEvent(window, 'load', sM.init, false);
sM.addEvent(window, 'unload', EventCache.flush, false);


/* Script to preload and scroll through images */
<!--
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];}
}

// Comma separated list of images to rotate 
var imgs = new Array('/images/header-wagga.jpg','/images/header-blowering.jpg','/images/header-boat-gauging.jpg','/images/header-flood.jpg','/images/header-mildura.jpg','/images/header-river.jpg','/images/header-staff-gauge.jpg','/images/header_dry_river.jpg');
// delay in milliseconds between image swaps 1000 = 1 second 
var delay = 3000;
var counter = 0;

function preloadImgs(){
	for(var i=0;i<imgs.length;i++){
		MM_preloadImages(imgs[i]);
	}
}

function randomImages(){
	if(counter == (imgs.length)){
		counter = 0;
	}
	MM_swapImage('rotator', '', imgs[counter++]);
	setTimeout('randomImages()', delay);
}