/* Extension written by David G. Miles (http://www.z3roadster.net/dreamweaver/) 
based in part on code written by Thomas Brattli (http://www.bratta.com)*/
// Courtesy of SimplytheBest.net - http://simplythebest.net/scripts/

//**********************************************************************************
// modified by mmp:
// - handle more than one scrolling area
//**********************************************************************************

function verifyCompatibleBrowser() {
	this.ver=navigator.appVersion;
	this.dom=document.getElementById?1:0 ;
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0; 
	this.ie4=(document.all && !this.dom)?1:0; 
	this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
	this.ns4=(document.layers && !this.dom)?1:0; 
	this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5);
	return this;
}
bw=new verifyCompatibleBrowser();

var speed=25;
var loop, timer;

function ConstructObject(obj,nest) {
	nest=(!nest) ? '':'document.'+nest+'.' 
	this.el=bw.dom?document.getElementById(obj):bw.ie4?document.all[obj]:bw.ns4?eval(nest+'document.'+obj):0; 
	this.css=bw.dom?document.getElementById(obj).style:bw.ie4?document.all[obj].style:bw.ns4?eval(nest+'document.'+obj):0; 
	this.scrollHeight=bw.ns4?this.css.document.height:this.el.offsetHeight;
	this.clipHeight=bw.ns4?this.css.clip.height:this.el.offsetHeight;
	this.up=MoveAreaUp;
	this.down=MoveAreaDown; 
	this.MoveArea=MoveArea;
	this.x;
	this.y; 
	this.obj = obj + "Object";
	eval(this.obj + "=this");
	return this
}
function MoveArea(x,y) {
	this.x=x;
	this.y=y;
	this.css.left=this.x;
	this.css.top=this.y;
}
function MoveAreaDown(move) {
	if (this.y > -this.scrollHeight+objContainer.clipHeight) {
		this.MoveArea(0,this.y-move) 
		if(loop) setTimeout(this.obj+".down("+move+")",speed) 
	}
}
function MoveAreaUp(move) {
	if(this.y<0) {
		this.MoveArea(0,this.y-move);
		if(loop) setTimeout(this.obj+".up("+move+")",speed);
	}
}
function PerformScroll(objcontainer,objscroller,speed) {
	if(initialised) {
		loop=true;
		objContainer = objcontainer;
		if(speed>0) {
			objscroller.down(speed);
		} else {
			objscroller.up(speed);
		}
	}
} 
function ScrollOnce(objcontainer,objscroller,speed) {
	if(initialised) {
		loop=false;
		objContainer = objcontainer;
		if(speed>0) {
			objscroller.down(speed);
		} else {
			objscroller.up(speed);
		}
	}
} 
function CeaseScroll() {
	loop=false;
	if(timer) clearTimeout(timer);
} 

var initialised; 
function InitialiseScrollableArea(containerStr,scrollerStr) {
	objContainer=new ConstructObject(containerStr);
	objScroller=new ConstructObject(scrollerStr,containerStr);
	objScroller.MoveArea(0,0);
	objContainer.css.visibility='visible';
	initialised=true;
	return objContainer;
}

function GetScroller() {
	return objScroller;
}

function displayStatusMsg(msgStr) {
	status=msgStr;
	document.returnValue = true;
}

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

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

function findObj(n, d) {
	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=findObj(n,d.layers[i].document);
	return x;
}

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

function reloadPage(init) {	 //reloads the window if Nav4 resized
	if (init == true) with (navigator) {
		if ((appName=="Netscape") && (parseInt(appVersion)==4)) {
			document.pgW=innerWidth;
			document.pgH=innerHeight;
			onresize=reloadPage;
		}
	}
	else if (innerWidth!=document.pgW || innerHeight!=document.pgH) location.reload();
}
reloadPage(true);