/*************************************************************************
  This code is from Dynamic Web Coding at dyn-web.com
  Copyright 2001-5 by Sharon Paine 
  See Terms of Use at www.dyn-web.com/bus/terms.html
  regarding conditions under which you may use this code.
  This notice must be retained in the code as is!
*************************************************************************/

/* 
    dw_scrollObj.js  version date: March 2005
    GeckoTableBugFix algorithm revised, and now excludes Safari and Konqueror.
    
    dw_scrollObj.js contains constructor and basic methods for scrolling layers.
    Use with dw_hoverscroll.js and/or dw_glidescroll.js,
    and when including scrollbars: dw_scroll-aux.js and dw_slidebar.js
*/

/*  Readable code available for licensed users */

dw_scrollObjs = {};
dw_scrollObj.speed=100;
dw_scrollObj.scrdy=true;;

function dw_scrollObj(wnId,lyrId,cntId){
	this.id=wnId;
	dw_scrollObjs[this.id]=this;
	this.animString="dw_scrollObjs."+this.id;this.load(lyrId,cntId);
};

dw_scrollObj.loadLayer=function(wnId,id,cntId){
	if(dw_scrollObjs[wnId])dw_scrollObjs[wnId].load(id,cntId);
};

dw_scrollObj.prototype.load=function(lyrId,cntId){
	if(!document.getElementById)return;
	var wndo,lyr;
	if(this.lyrId){
		lyr=document.getElementById(this.lyrId);
		lyr.style.visibility="hidden";
	}
	lyr=document.getElementById(lyrId);
	wndo=document.getElementById(this.id);
	lyr.style.top=this.y=0;
	lyr.style.left=this.x=0;
	this.maxY=(lyr.offsetHeight-wndo.offsetHeight>0)?lyr.offsetHeight-wndo.offsetHeight:0;
	this.wd=cntId?document.getElementById(cntId).offsetWidth:lyr.offsetWidth;
	this.maxX=(this.wd-wndo.offsetWidth>0)?this.wd-wndo.offsetWidth:0;
	this.lyrId=lyrId;
	lyr.style.visibility="visible";
	this.on_load();
	this.ready=true;
};

dw_scrollObj.prototype.on_load=function(){};

dw_scrollObj.prototype.shiftTo=function(lyr,x,y){
	if(!lyr.style)return;
	lyr.style.left=(this.x=x)+"px";
	lyr.style.top=(this.y=y)+"px";
};

dw_scrollObj.GeckoTableBugFix=function(){
	var ua=navigator.userAgent;
	if(ua.indexOf("Gecko")>-1&&ua.indexOf("Firefox")==-1&&ua.indexOf("Safari")==-1&&ua.indexOf("Konqueror")==-1){
		dw_scrollObj.hold=[];
		for(var i=0;arguments[i];i++){
			if(dw_scrollObjs[arguments[i]]){
				var wndo=document.getElementById(arguments[i]);
				var holderId=wndo.parentNode.id;
				var holder=document.getElementById(holderId);
				document.body.appendChild(holder.removeChild(wndo));
				wndo.style.zIndex=1000;
				var pos=getPageOffsets(holder);
				wndo.style.left=pos.x+"px";
				wndo.style.top=pos.y+"px";
				dw_scrollObj.hold[i]=[arguments[i],holderId];
			}
		}
		window.addEventListener("resize",dw_scrollObj.rePositionGecko,true);
	}
};

dw_scrollObj.rePositionGecko=function(){
	if(dw_scrollObj.hold){
		for(var i=0;dw_scrollObj.hold[i];i++){
			var wndo=document.getElementById(dw_scrollObj.hold[i][0]);
			var holder=document.getElementById(dw_scrollObj.hold[i][1]);
			var pos=getPageOffsets(holder);
			wndo.style.left=pos.x+"px";
			wndo.style.top=pos.y+"px";
		}
	}
};

function getPageOffsets(el){
	var left=el.offsetLeft;
	var top=el.offsetTop;
	if(el.offsetParent&&el.offsetParent.clientLeft||el.offsetParent.clientTop){
		left+=el.offsetParent.clientLeft;
		top+=el.offsetParent.clientTop;
	}
	while(el=el.offsetParent){
		left+=el.offsetLeft;
		top+=el.offsetTop;
	}
	return{x:left,y:top};
};