var iversion = -1;
var roll = false;

function version() {
	if (iversion != -1) return roll;
	if (navigator.appName.indexOf("Netscape") != -1) { // Netscape
		if (navigator.userAgent.indexOf("Mozilla/") != -1)
			iversion = parseFloat(navigator.appVersion)
		else
			iversion = 1;
			roll = (3<=iversion);
	} else {  // Not netscape.
		if (navigator.appName.indexOf("Internet Explorer") != -1) {
			if (navigator.userAgent.indexOf("Mozilla/") != -1) 
				iversion = parseFloat(navigator.appVersion)
			else
				iversion = 1;
		} else {
			iversion = 1;
		}
		roll = (3 <= iversion);
	}
	return roll;
}

function chimg(pic, name) {
	if (roll) {
		pic.src = name.src;
	}
}