var is = {  ie:   navigator.appName == 'Microsoft Internet Explorer',
		    ns:   navigator.appName == 'Netscape',
		    vs:   parseFloat(navigator.appVersion.substr(21)) || parseFloat(navigator.appVersion)}

var str1 = (is.ie)?'all.':(is.vs>='5')?'getElementById("':'';
var str2 = (is.ie)?'.style':(is.vs>='5')?'").style':'';
var ok = (is.ie&&is.vs>='4'||is.ns&&is.vs>='4')?true:false;

function divSwitch (div,num) {
	if (ok) {
		var vis = (num==0)?'hidden':'visible';
		eval('document.' + str1 + div + str2 + '.visibility = "' + vis + '"');
	}		
}