(function(){
	var userAgent = navigator.userAgent.toLowerCase();
	window.browser = {
		version: (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [0,'0'])[1],
	    mac: /macintosh/.test( userAgent )
	};
})();
var loadScript = function() {
	if (browser.mac && !haveAcrobat()){
		document.getElementById('HelpPanel').style.display = 'block';
		document.getElementById('CloseBtn').onclick = function() {
		    this.parentNode.style.display = 'none';
		}
	}
}
function haveAcrobat() {
    for (i = 0; i < navigator.plugins.length; ++i) {
        if (navigator.plugins[i].name.match(/Acrobat/))
            return true;
    }
    return false;
}

window.onload = loadScript;