img1off = new Image();
img1off.src = "images/catering/homeBut.gif";
img2off = new Image();
img2off.src = "images/catering/offSiteBut.gif";
img3off = new Image();
img3off.src = "images/catering/corporateBut.gif";
img4off = new Image();
img4off.src = "images/catering/contactBut.gif";
img5off = new Image();
img5off.src = "images/catering/barBut.gif";

img1on = new Image();
img1on.src = "images/catering/homeBut_over.gif";
img2on = new Image();
img2on.src = "images/catering/offSiteBut_over.gif";
img3on = new Image();
img3on.src = "images/catering/corporateBut_over.gif";
img4on = new Image();
img4on.src = "images/catering/contactBut_over.gif";
img5on = new Image();
img5on.src = "images/catering/barBut_over.gif";

function imgAct(imgName){
	document[imgName].src = eval(imgName + "on.src");
}

function imgInAct(imgName){
	document[imgName].src = eval(imgName + "off.src");
}