Gudubeth

Here is the crossbrowser javascript code for changing flash object’s size. Works fine in IE5.5, IE6, IE7, IE8, Firefox 3, Opera 10, Safari 4, Chrome 3.

Usage
Resizing Flash:
flashResizer.resize(width, height, flash_object_id);

Zoom In:
flashResizer.zoomin(flash_object_id);

Zoom Out:
flashResizer.zoomout(flash_object_id);

Javascript Code:

var flashResizer = {
    ZOOM_IN:1,ZOOM_OUT:-1,
    fo:null,ZOOM_FACTOR:0.1,
    findObj:function(_foid){if(_foid==undefined || _foid==null){return this.fo;}
        this.fo=null;if (window.document[_foid]) this.fo=window.document[_foid];
        else if (navigator.appName.indexOf("Microsoft Internet")==-1){
            if (document.embeds && document.embeds[_foid]) this.fo = document.embeds[_foid];}
        else this.fo = document.getElementById(_foid);return this.fo;},
    resize:function(_w,_h,_foid){if(this.findObj(_foid)){
            this.fo.width=_w;this.fo.height=_h;}return this;},
    zoom:function(_d,_f){if(this.findObj(_f)){var zf=1+_d*this.ZOOM_FACTOR;
            this.resize(this.fo.width*zf,this.fo.height*zf);}return this;},
    zoomin:function(_f){this.zoom(this.ZOOM_IN,_f);},
    zoomout:function(_f){this.zoom(this.ZOOM_OUT, _f);}
}

Same Javascript Code With Comments (Longer Code):

var flashResizer = {
    fo:null, //flash object
    ZOOM_FACTOR:0.1, // how much resizing will happen. used in zoom

    ZOOM_IN:1,
    ZOOM_OUT:-1,

    /**
     * find flash object - cross browser
     * look at http://blog.codefidelity.com/?p=14
     * @param _foid  DOM id of flash object. if no _foid is given,
     *               uses previously found flash object
     * @return       flash object. null if no object is found
     */
    findObj:function(_foid){
        if(_foid==undefined || _foid==null){
           return this.fo;
        }
        this.fo=null;
        if (window.document[_foid]) this.fo=window.document[_foid];
        else if (navigator.appName.indexOf("Microsoft Internet")==-1){
            if (document.embeds && document.embeds[_foid]) this.fo = document.embeds[_foid];
        }
        else this.fo = document.getElementById(_foid);

        return this.fo;
    },

    /**
     * resize flash to specified size
     * @param _w: new width
     * @param _h: new height
     * @param _foid: flash object id. if no _foid is given,
     *               uses previously found flash object.
     * @return this object
     */
    resize:function(_w, _h, _foid){
        if(this.findObj(_foid)){
            this.fo.width = _w;
            this.fo.height = _h;
        }
        return this;
    },

    /**
    * @param _d: zoom direction. flashResize.ZOOM_IN or 1 to zoom in,
    *            flashResize.ZOOM_OUT or-1 to zoom out.
    *            factor size also changes the zoom factor
    * @param _foid: flash object id. if no _foid is given,
    *               uses previously found flash object.
    * @return  this object
    */
    zoom:function(_d, _foid){
        if(this.findObj(_foid)){
            var zf = 1 + _d * this.ZOOM_FACTOR;
            this.resize(this.fo.width*zf, this.fo.height*zf);
        }
        return this;
    },

    /**
     * @param _foid: flash id. if no _foid is given, uses previously found flash object.
     */
    zoomin:function(_foid){
        return this.zoom(this.ZOOM_IN, _foid);
    },

    /**
     * @param _foid: flash id. if no _foid is given, uses previously found flash object.
     */
    zoomout:function(_foid){
        return this.zoom(this.ZOOM_OUT, _foid);
    }
}