title: What does "Object.call" mean?
body: <pre><code>function bb_graphics_GraphicsContext(){
      Object.call(this);
      this.bbdevice=null;
      this.bbmatrixSp=0;
      this.bbix=1.000000;
      this.bbiy=0;
      this.bbjx=0;
      this.bbjy=1.000000;
      this.bbtx=0;
      this.bbty=0;
      this.bbtformed=0;
      this.bbmatDirty=0;
      this.bbcolor_r=0;
      this.bbcolor_g=0;
      this.bbcolor_b=0;
      this.bbalpha=0;
      this.bbblend=0;
      this.bbscissor_x=0;
      this.bbscissor_y=0;
      this.bbscissor_width=0;
      this.bbscissor_height=0;
      this.bbmatrixStack=new_number_array(192);
  }
  </code></pre>
  
  <p>What does <code>Object.call(this)</code> mean?</p>