/*************************************************************************
  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
*/

dw_scrollObjs = {};
dw_scrollObj.speed=100;

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||!dw_scrollObj.scrdy)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};
};

dw_scrollObj.scrdy=true;

function initScrollLayer() {
   dw_scrollObj.GeckoTableBugFix();
}