if (document.images) {
cv_off = new Image(); cv_off.src = "images/cv_off.jpg"
cv_over = new Image(); cv_over.src = "images/cv_over.jpg"

}

function turn_off(ImageName) {
	if (document.images != null) {
		document[ImageName].src = eval(ImageName + "_off.src");
	}
}

function turn_over(ImageName) {
	if (document.images != null) {
		document[ImageName].src = eval(ImageName + "_over.src");
	}
}