/*****************************************************************************************
    dw_write.js 
    write to positioned div (absolute or relative)
    Designed specifically to provide capability for ns4 to write to a layer in a table 
    For writing to absolute-positioned layer you can also   use dw_core.js.
    version date: April 2003
    
    This code is from Dynamic Web Coding 
  at http://www.dyn-web.com/
  Copyright 2001-3 by Sharon Paine 
  See Terms of Use at http://www.dyn-web.com/bus/terms.html
  Permission granted to use this code 
  as long as this entire notice is included.    
*******************************************************************************************/

// constructor function (x,y optional)
function writeObj(id,wd,ht,x,y) {
    if (!id) return;    // for when writeObj used as prototype
    if (document.getElementById||document.all) {
        this.el = (document.getElementById)? document.getElementById(id): document.all[id];
        this.css = this.el.style;   this.doc = this.el;
        this.css.width=wd+"px"; this.css.height=ht+"px";
  } else if (document.layers) {
        var lyrRef = getLyrRef(id,document);    // in case id nested
        // create layer inside to write to
        // in case id relative positioned
        this.el = new Layer(wd,lyrRef); 
        lyrRef.resizeTo(wd,ht);
        this.el.visibility = "inherit"; // new Layer initially hidden
        this.doc = this.el.document;    // write to inner layer
        // use outer layer for shifting, show/hide
        this.css = this.el.parentLayer; 
    } else return null; // (if not ...byId or ...all or ...layers)
    var px = (document.layers)? "": "px";
    this.x = x || 0;    if (x) this.css.left = this.x+px;
    this.y = y || 0;    if (y) this.css.top = this.y+px;
    this.obj = id+"Object"; eval(this.obj+"=this"); // used by banner
}

//  Methods
writeObj.prototype.writeLyr = function (cntnt) {
    if (typeof this.doc.innerHTML!="undefined") {
      this.doc.innerHTML = cntnt;
  } else if (document.layers) {
            this.doc.write(cntnt);
            this.doc.close();
  }
}

writeObj.prototype.show = function () { this.css.visibility = "visible"; }
writeObj.prototype.hide = function () { this.css.visibility = "hidden"; }

writeObj.prototype.shiftTo = function (x,y) {
    if (x!=null) this.x=x; if (y!=null) this.y=y;   
    if (this.css.moveTo) { 
        this.css.moveTo(Math.round(this.x),Math.round(this.y)); 
    } else { 
        this.css.left=Math.round(this.x)+"px"; 
        this.css.top=Math.round(this.y)+"px"; 
    }
}

writeObj.prototype.shiftBy = function (x,y) {
    this.shiftTo(this.x+x,this.y+y);
}

// credit to http://www.13thparallel.org for the following 2 functions
// returns amount of vertical scroll
function getScrollY() {
    var sy = 0;
    if (document.documentElement && document.documentElement.scrollTop)
        sy = document.documentElement.scrollTop;
    else if (document.body && document.body.scrollTop) 
        sy = document.body.scrollTop; 
    else if (window.pageYOffset)
        sy = window.pageYOffset;
    else if (window.scrollY)
        sy = window.scrollY;
    return sy;
}

// returns amount of horizontal scroll
function getScrollX() {
    var sx = 0;
    if (document.documentElement && document.documentElement.scrollLeft)
        sx = document.documentElement.scrollLeft;
    else if (document.body && document.body.scrollLeft) 
        sx = document.body.scrollLeft; 
    else if (window.pageXOffset)
        sx = window.pageXOffset;
    else if (window.scrollX)
        sx = window.scrollX;
    return sx;
}


// get reference to nested layer for ns4
// from dhtmllib.js by Mike Hall of www.brainjar.com
function getLyrRef(lyr,doc) {
    if (document.layers) {
        var theLyr;
        for (var i=0; i<doc.layers.length; i++) {
        theLyr = doc.layers[i];
            if (theLyr.name == lyr) return theLyr;
            else if (theLyr.document.layers.length > 0) 
            if ((theLyr = getLyrRef(lyr,theLyr.document)) != null)
                    return theLyr;
      }
        return null;
  }
}