if (document.images){

var hsc1a=new Image;
hsc1a.src="button/button1hell.jpg";
var hsc1b=new Image;
hsc1b.src="button/button1dunkel.jpg";

var hsc2a=new Image;
hsc2a.src="button/button2hell.jpg";
var hsc2b=new Image;
hsc2b.src="button/button2dunkel.jpg";

var hsc3a=new Image;
hsc3a.src="button/button3hell.jpg";
var hsc3b=new Image;
hsc3b.src="button/button3dunkel.jpg";

var hsc4a=new Image;
hsc4a.src="button/button4hell.jpg";
var hsc4b=new Image;
hsc4b.src="button/button4dunkel.jpg";

var hsc5a=new Image;
hsc5a.src="button/button5hell.jpg";
var hsc5b=new Image;
hsc5b.src="button/button5dunkel.jpg";

var hsc6a=new Image;
hsc6a.src="button/button6hell.jpg";
var hsc6b=new Image;
hsc6b.src="button/button6dunkel.jpg";

var hsc7a=new Image;
hsc7a.src="button/button7hell.jpg";
var hsc7b=new Image;
hsc7b.src="button/button7dunkel.jpg";

var hsc8a=new Image;
hsc8a.src="button/button8hell.jpg";
var hsc8b=new Image;
hsc8b.src="button/button8dunkel.jpg";

}
else {
alert("Leider kann Ihr Browser keine dynamischen Effekte anzeigen.");
}