if (document.images) {
 var imgPath = "images/"
 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_prod_on.gif";
 var np0 = new Image; np0.src = imgPath + "n_prod.gif";
  var nd1 = new Image; nd1.src = imgPath + "n_dev_on.gif";
 var nd0 = new Image; nd0.src = imgPath + "n_dev.gif";
   var nc1 = new Image; nc1.src = imgPath + "n_cont_on.gif";
 var nc0 = new Image; nc0.src = imgPath + "n_cont.gif";
    var st1 = new Image; st1.src = imgPath + "n_store_on.gif";
 var st0 = new Image; st0.src = imgPath + "n_store.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;
		}
	}
}