var isInternetExplorer = navigator.appName.indexOf("Microsoft") != -1;

function site_DoFSCommand(command, args) {
	var siteObj = isInternetExplorer ? document.all.site : document.site;
	switch (command){
		case "sendMail":window.open("_mail/index.php","mail","width=600 height=300 scrollbars=yes resizable=yes");break;

	}
	
}