function preload(){
  var x,y=[],i=0;while(x=arguments[i]){y[i]=new Image();y[i++].src=x}
}
preload('images/button1b.gif','images/button2b.gif','images/button3b.gif','images/button4b.gif','images/button5b.gif','images/button6b.gif','images/button7b.gif','images/button8b.gif','images/button_small1b.gif','images/button_small2b.gif','images/button_small3b.gif','images/button_small4b.gif');