////////////////////////////////////////////////////////////////////////////////////
// Image Functions
////////////////////////////////////////////////////////////////////////////////////

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_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_findObj(n, d) { //v4.0
	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 && document.getElementById) x=document.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];}
}

////////////////////////////////////////////////////////////////////////////////////
// Random Image Function
////////////////////////////////////////////////////////////////////////////////////

function loadHomeImgs(imgNum) {
	// config variables
	var r = 13; // total number of image sets
	var sessiononly = false; // rotate only on a new session?
	var folder = ''; // folder within top_imgs that holds the image sets
	// check for existing images
	if (!document.topimages) {
		if (sessiononly) {
			// check for a cookie
			n = getCookie('imgset');
			if (n) {
				n = parseInt(n);
			} else {
				// get random number
				n = (Math.floor(Math.random()*r) + 1);
				// set cookie
				setCookie('imgset', n);
			}
		} else {
			n = (Math.floor(Math.random()*r) + 1);
		}
		// write the images to an array
		document.topimages = new Array(
			'<img id="topimg1" name="topimg1" src="/images/home/top_imgs/'+folder+'top_img'+n+'-1.jpg" width="380" height="190" alt="" border="0">',
			'<img id="topimg1" name="topimg1" src="/images/home/top_imgs/'+folder+'top_img'+n+'-2.jpg" width="190" height="190" alt="" border="0">'
		);
	}
	// write image
	document.write(document.topimages[imgNum]);
	
	/* This method swapped a spacer gif instead of using document.write() - it seemed too slow
	MM_swapImage('topimg1','','/images/home/top_imgs/-1.jpg',1);
	MM_swapImage('topimg2','','/images/home/top_imgs/'+folder+'top_img'+n+'-2.jpg',1);
	*/
}

////////////////////////////////////////////////////////////////////////////////////
// Cookie Functions
////////////////////////////////////////////////////////////////////////////////////

function getCookie(name) {
	var dc = document.cookie;
	var index = dc.indexOf(name + "=");
	if (index == -1) return null;
	index = dc.indexOf("=", index) + 1; // first character
	var endstr = dc.indexOf(";", index);
	if (endstr == -1) endstr = dc.length; // last character
	return unescape(dc.substring(index, endstr));
}

function setCookie(name, value) {
  var curCookie = name + "=" + escape(value);
  document.cookie = curCookie;
}