function checkValidBrowser() {
var version = parseInt(navigator.appVersion);
var minVer = 4;
var url = 'NkiModules/html/browser_error.html';
var ok = false;
	
	if ((navigator.appName.indexOf("Microsoft") > -1) || 
	    (navigator.appName.indexOf("MSIE") > -1)) {
	    ok = (version >= minVer ? true:false);
    }
    else if (navigator.appName.indexOf("Netscape") > -1) {
	    ok = (version >= minVer ? true:false);
    }
    else if (navigator.appName.indexOf("Opera") > -1) {
	    ok = (version >= minVer ? true:false);
    }

	if (!ok) window.location.href = url;
}

function checkValidJs(jsVer) {
var url = 'NkiModules/html/version_error.html';

	if (jsVer != "1.2") window.location.href = url;
}