dw_scrollObj.prototype.bSizeDragBar=true;
dw_scrollObj.prototype.setUpScrollbar=function(id,trkId,axis,offx,offy){
if(!document.getElementById)return;
var bar=document.getElementById(id);
var trk=document.getElementById(trkId);
dw_slidebar.init(bar,trk,axis,offx,offy);
bar.wn=dw_scrollObjs[this.id];
if(axis=="v")this.vBarId=id;else this.hBarId=id;
if(this.bSizeDragBar)this.setBarSize();
bar.on_drag_start=bar.on_slide_start=dw_scrollObj.getWndoLyrRef;
bar.on_drag_end=bar.on_slide_end=dw_scrollObj.tossWndoLyrRef;
bar.on_drag=bar.on_slide=dw_scrollObj.UpdateWndoLyrPos;
}
dw_scrollObj.getWndoLyrRef=function(){this.wnLyr=document.getElementById(this.wn.lyrId);}
dw_scrollObj.tossWndoLyrRef=function(){this.wnLyr=null;}
dw_scrollObj.UpdateWndoLyrPos=function(x,y){
var nx,ny;
if(this.axis=="v"){
nx=this.wn.x;
ny=-(y-this.minY)*(this.wn.maxY/(this.maxY-this.minY))||0;
}else{
ny=this.wn.y;
nx=-(x-this.minX)*(this.wn.maxX/(this.maxX-this.minX))||0;
}
this.wn.shiftTo(this.wnLyr,nx,ny);
}
dw_scrollObj.prototype.updateScrollbar=function(x,y){
var nx,ny;
if(this.vBarId){
if(!this.maxY)return;
ny=-(y*((this.vbar.maxY-this.vbar.minY)/this.maxY)-this.vbar.minY);
ny=Math.min(Math.max(ny,this.vbar.minY),this.vbar.maxY);
nx=parseInt(this.vbar.style.left);
this.vbar.style.left=nx+"px";this.vbar.style.top=ny+"px";
}if(this.hBarId){
if(!this.maxX)return;
nx=-(x*((this.hbar.maxX-this.hbar.minX)/this.maxX)-this.hbar.minX);
nx=Math.min(Math.max(nx,this.hbar.minX),this.hbar.maxX);
ny=parseInt(this.hbar.style.top);
this.hbar.style.left=nx+"px";this.hbar.style.top=ny+"px";
}
}
dw_scrollObj.prototype.restoreScrollbars=function(){
var bar;
if(this.vBarId){
bar=document.getElementById(this.vBarId);
bar.style.left=bar.minX+"px";bar.style.top=bar.minY+"px";
}
if(this.hBarId){
bar=document.getElementById(this.hBarId);
bar.style.left=bar.minX+"px";bar.style.top=bar.minY+"px";
}
}
dw_scrollObj.prototype.setBarSize=function(){
var bar;
var lyr=document.getElementById(this.lyrId);
var wn=document.getElementById(this.id);
if(this.vBarId){
bar=document.getElementById(this.vBarId);
bar.style.height=(lyr.offsetHeight>wn.offsetHeight)?bar.trkHt/(lyr.offsetHeight/wn.offsetHeight)+"px":bar.trkHt-2*bar.minY+"px";
bar.maxY=bar.trkHt-bar.offsetHeight-bar.minY;
}
if(this.hBarId){
bar=document.getElementById(this.hBarId);
bar.style.width=(this.wd>wn.offsetWidth)?bar.trkWd/(this.wd/wn.offsetWidth)+"px":bar.trkWd-2*bar.minX+"px";
bar.maxX=bar.trkWd-bar.offsetWidth-bar.minX;
}
}
dw_scrollObj.prototype.on_load=function(){
this.restoreScrollbars();
if(this.bSizeDragBar)this.setBarSize();
}
dw_scrollObj.prototype.on_scroll=dw_scrollObj.prototype.on_slide=function(x,y){this.updateScrollbar(x,y);}
dw_scrollObj.prototype.on_scroll_start=dw_scrollObj.prototype.on_slide_start=function(){
if(this.vBarId)this.vbar=document.getElementById(this.vBarId);
if(this.hBarId)this.hbar=document.getElementById(this.hBarId);
}
dw_scrollObj.prototype.on_scroll_end=dw_scrollObj.prototype.on_slide_end=function(x,y){
this.updateScrollbar(x,y);
this.lyr=null;this.bar=null;
}