/*************************************************************************
  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;