/*************************************************************************
  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) return;
  if(!lyr.style)return;
//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};
};