image31=new Image(4,3)
image31.src="monbut.gif"
image32=new Image(4,6)
image32.src="pcbut.gif"
image33=new Image(28,27)
image33.src="plug.gif"
image34=new Image(177,145)
image34.src="slide.gif"

function plugin(){
document.monbut.src=image31.src;
document.pcbut.src=image32.src;
document.plug.src=image33.src;
document.slide.src=image34.src;
}