function bg(){
<!--
	if (screen.width >= 1280) {
		
	    document.getElementById('kader').style.backgroundImage='url(http://www.happywoka16.com/images/achtergrond/1280_a.jpg)';
	    document.getElementById('kader').style.backgroundRepeat='no-repeat';
	    document.getElementById('kader').style.backgroundPosition='center center';
	    
        } else if (screen.width <= 1280 && screen.height <= 800) {
		
                   document.getElementById('kader').style.backgroundImage='url(http://www.happywoka16.com/images/achtergrond/1280_b.jpg)';
	           document.getElementById('kader').style.backgroundRepeat='no-repeat';
	           document.getElementById('kader').style.backgroundPosition='center center';
		   
        } else if (screen.width <= 1280 && screen.height <= 1024) {
		
          	   document.getElementById('kader').style.backgroundImage='url(http://www.happywoka16.com/images/achtergrond/1280_a.jpg)';
	           document.getElementById('kader').style.backgroundRepeat='no-repeat';
	           document.getElementById('kader').style.backgroundPosition='center center';
		   
        } else if (screen.width <= 1440) {
		
          	   document.getElementById('kader').style.backgroundImage='url(http://www.happywoka16.com/images/achtergrond/1440.jpg)';
	           document.getElementById('kader').style.backgroundRepeat='no-repeat';
	           document.getElementById('kader').style.backgroundPosition='center center';
		   
        } else {
		
            document.getElementById('kader').style.backgroundImage='url(http://www.happywoka16.com/images/achtergrond/1900.jpg)';
	    document.getElementById('kader').style.backgroundRepeat='no-repeat';
	    document.getElementById('kader').style.backgroundPosition='center center';
	    
        }
}
//-->