var imgarr = new Array(20)

imgarr[0]=new Image();
imgarr[0].src="images/over_off.gif";
imgarr[1]=new Image();
imgarr[1].src="images/over_on.gif";

imgarr[2]=new Image();
imgarr[2].src="images/aqui_off.gif";
imgarr[3]=new Image();
imgarr[3].src="images/aqui_on.gif";

imgarr[4]=new Image();
imgarr[4].src="images/con_off.gif";
imgarr[5]=new Image();
imgarr[5].src="images/con_on.gif";

imgarr[6]=new Image();
imgarr[6].src="images/bis_off.gif";
imgarr[7]=new Image();
imgarr[7].src="images/bis_on.gif";

imgarr[8]=new Image();
imgarr[8].src="images/exhib_off.gif";
imgarr[9]=new Image();
imgarr[9].src="images/exhib_on.gif";

imgarr[10]=new Image();
imgarr[10].src="images/test_off.gif";
imgarr[11]=new Image();
imgarr[11].src="images/test_on.gif";

imgarr[12]=new Image();
imgarr[12].src="images/trans_off.gif";
imgarr[13]=new Image();
imgarr[13].src="images/trans_on.gif";

imgarr[14]=new Image();
imgarr[14].src="images/articles_off.gif";
imgarr[15]=new Image();
imgarr[15].src="images/articles_on.gif";

imgarr[16]=new Image();
imgarr[16].src="images/contact_off.gif";
imgarr[17]=new Image();
imgarr[17].src="images/contact_on.gif";

function swap(imgref, imgto)
	{
	eval ('document.'+imgref+'.src = imgarr['+imgto+'].src');
	return true;
	}