function MM_preloadImages() { //v3.0
	var d = document;
	if(d.images) {
		if(!d.MM_p) {
			d.MM_p=new Array();
		}
	}

	var i, j = d.MM_p.length, a = MM_preloadImages.arguments;
	for (i = 0; i < a.length; i++) {
		if (a[i].indexOf("#") != 0) {
			d.MM_p[j] = new Image; d.MM_p[j++].src = a[i];
		}
	}
}

var isNav, isIE;

if (parseInt(navigator.appVersion.charAt(0)) >= 4) {
	isNav = (navigator.appName == "Netscape") ? 1 : 0;
	isIE = (navigator.appName.indexOf("Microsoft") != -1) ? 1 : 0;
}

function gunnerOver() { document.gunner.src = "images/main.gunner.on.jpg"; }
function gunnerOut() { document.gunner.src = "images/main.gunner.off.jpg"; }

function mortarOver() { document.mortar.src = "images/main.mortar.on.jpg"; }
function mortarOut() { document.mortar.src = "images/main.mortar.off.jpg"; }

function moppOver() { document.mopp.src = "images/main.mopp.on.jpg"; }
function moppOut() { document.mopp.src = "images/main.mopp.off.jpg"; }

function grenadierOver() { document.grenadier.src = "images/main.grenadier.on.jpg"; }
function grenadierOut() { document.grenadier.src = "images/main.grenadier.off.jpg"; }