if (document.images) {
 var imgPath = "images/"
  var nh1 = new Image; nh1.src = imgPath + "n_home_on.gif";
 var nh0 = new Image; nh0.src = imgPath + "n_home.gif";
 var ns1 = new Image; ns1.src = imgPath + "n_self_on.gif";
 var ns0 = new Image; ns0.src = imgPath + "n_self.gif";
 var nt1 = new Image; nt1.src = imgPath + "n_tested_on.gif";
 var nt0 = new Image; nt0.src = imgPath + "n_tested.gif";
 var na1 = new Image; na1.src = imgPath + "n_about_on.gif";
 var na0 = new Image; na0.src = imgPath + "n_about.gif";
 var np1 = new Image; np1.src = imgPath + "n_prevention_on.gif";
 var np0 = new Image; np0.src = imgPath + "n_prevention.gif";
 var ntr1 = new Image; ntr1.src = imgPath + "n_treatment_on.gif";
 var ntr0 = new Image; ntr0.src = imgPath + "n_treatment.gif";
 var nl1 = new Image; nl1.src = imgPath + "n_living_on.gif";
 var nl0 = new Image; nl0.src = imgPath + "n_living.gif";
 var nb1 = new Image; nb1.src = imgPath + "n_blood_on.gif";
 var nb0 = new Image; nb0.src = imgPath + "n_blood.gif";
 var npr1 = new Image; npr1.src = imgPath + "n_prov_on.gif";
 var npr0 = new Image; npr0.src = imgPath + "n_prov.gif";

}

//**************************************************************//

function doRollover(imgName, onOff) {
	if (document.images) {
	var targetObj = eval(imgName+onOff);
		if (document.images[imgName] != null && targetObj != null) {
		document.images[imgName].src = targetObj.src;
		}
	}
}