if (document.images){
var button0on = new Image (180, 31)
button0on.src = "../images/button0over.png"
var button0off = new Image (180, 31)
button0off.src = "../images/button0out.png"

var button1on = new Image (180, 31)
button1on.src = "../images/button1over.png"
var button1off = new Image (180, 31)
button1off.src = "../images/button1out.png"

var button2on = new Image (180, 31)
button2on.src = "../images/button2over.png"
var button2off = new Image (180, 31)
button2off.src = "../images/button2out.png"

var button3on = new Image (180, 31)
button3on.src = "../images/button3over.png"
var button3off = new Image (180, 31)
button3off.src = "../images/button3out.png"

var button4on = new Image (180, 31)
button4on.src = "../images/button4over.png"
var button4off = new Image (180, 31)
button4off.src = "../images/button4out.png"

var button5on = new Image (180, 31)
button5on.src = "../images/button5over.png"
var button5off = new Image (180, 31)
button5off.src = "../images/button5out.png"

var button6on = new Image (180, 31)
button6on.src = "../images/button6over.png"
var button6off = new Image (180, 31)
button6off.src = "../images/button6out.png"

var descriptionoff = new Image (180,79)
descriptionoff.src = "../images/blank.png"

var desc1off = new Image (180,79)
desc1off.src ="../images/desc1off.png"

var desc2off = new Image (180,79)
desc2off.src ="../images/desc2off.png"

var desc3off = new Image (180,79)
desc3off.src ="../images/desc3off.png"

var desc4off = new Image (180,79)
desc4off.src ="../images/desc4off.png"

var desc5off = new Image (180,79)
desc5off.src ="../images/desc5off.png"

var desc6off = new Image (180,79)
desc6off.src ="../images/desc6off.png"

var descblankoff = new Image (180,79)
descblankoff.src="../images/descblankoff.png"

var button0desc = new Image (180,79)
button0desc.src = "../images/desc0.png"

var button1desc = new Image (180,79)
button1desc.src = "../images/desc1.png"

var button2desc = new Image (180,79)
button2desc.src = "../images/desc2.png"

var button3desc = new Image (180,79)
button3desc.src = "../images/desc3.png"

var button4desc = new Image (180,79)
button4desc.src = "../images/desc4.png"

var button5desc = new Image (180,79)
button5desc.src = "../images/desc5.png"

var button6desc = new Image (180,79)
button6desc.src = "../images/desc6.png"
}

function on(imgName) {
	if (document.images)  {
        document[imgName].src = eval(imgName + "on.src");
        document.description.src = eval(imgName + "desc.src");
        return true;
	}
}

function off (imgName, descNum){
	if (document.images)  {
        document[imgName].src = eval(imgName + "off.src");
        document.description.src = eval(descNum + "off.src");
        return true;
	}
}