if (document.images) {

img1on = new Image();
img1on.src = "images/rates_over.gif";
img2on = new Image();
img2on.src = "images/terms_over.gif";
img11on = new Image();
img11on.src = "images/free_salary_over.gif";
img1off = new Image();
img1off.src = "images/rates.gif";
img2off = new Image();
img2off.src = "images/terms.gif";
img11off = new Image();
img11off.src = "images/free_salary.gif";
}

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

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