show = new Image();
show.src = "../images/show.gif";
hide = new Image();
hide.src = "../images/hide.gif";

var on = false;

function microLo(docId) {
//toggles locator show hide button and document 
	if (on == true) {
		document.toggle.src = "../images/show.gif";
		document[docId].src = eval(docId + ".src");
		on = false;
	}
	else if (on == false) {
		document.toggle.src = "../images/hide.gif";
		document[docId].src = eval(docId + "_sho.src");
		on = true;
	}
}

function over(imgName) {
    //displays rollover state when nav elements are rolled over 
    if (document.images) {
        document[imgName].src = eval(imgName + "_over" + ".src");
    }
}

function off(imgName) {
    //reverts images to normal state when nav elements are rolled off
    if (document.images) {
        document[imgName].src = eval(imgName + "_off.src");
    }
}