function init(){

  mySlider = new Bs_Slider();
  mySlider.attachOnChange(bsSliderChange);
  mySlider.width         = 107;
  mySlider.height        = 20;
  mySlider.minVal        = 0;
  mySlider.maxVal        = 2;
  mySlider.valueDefault  = 1;
  mySlider.valueInterval = 0.1;
  mySlider.imgDir   = '';
  mySlider.setBackgroundImage('http://proxy.spele.nl/images/layout/slider_bg.gif', 'no-repeat');
  mySlider.setSliderIcon('http://proxy.spele.nl/images/layout/slider.gif', 15, 19);
  mySlider.useInputField = 0;
  mySlider.draw('div_slider');

}

function bsSliderChange(sliderObj, val, newPos){ 
	
	height = parseInt(document.getElementById('input_game_height').value)*val;
	width = parseInt(document.getElementById('input_game_width').value)*val;

	document.getElementById('iframe_game').height = height;
	document.getElementById('iframe_game').width = width;
  
}