function login()
{
var agt = navigator.userAgent.toLowerCase();
document.frmlogin.appname.value ="microsoft";
document.frmlogin.os.value = "window";

if (agt.indexOf("win") != -1) {document.frmlogin.os.value = "window" ;} 
else if (agt.indexOf("mac") != -1) {document.frmlogin.os.value = "mac" ;} 
else if (agt.indexOf("linux") != -1) {document.frmlogin.os.value = "linux" ;} 
else if (agt.indexOf("x11") != -1) {document.frmlogin.os.value = "x11" ;} 
else {document.frmlogin.os.value = "unknown" ;}

if(agt.indexOf("microsoft") != -1) {document.frmlogin.appname.value ="microsoft";} 
else if(agt.indexOf("msie") != -1) {document.frmlogin.appname.value ="microsoft";}
else if(agt.indexOf("firefox") != -1) {document.frmlogin.appname.value ="firefox";}
else if(agt.indexOf("safari") != -1) {document.frmlogin.appname.value ="safari";}
else {document.frmlogin.appname.value = "unknown" ;}

if(Trim(document.frmlogin.userid.value) == '')
	{	alert("User ID is required.");
		document.frmlogin.userid.focus();
		return;
	}
	
if(Trim(document.frmlogin.password.value) == '')
	{
		alert("System does not allow a blank password.");
		document.frmlogin.password.value = "";
		document.frmlogin.password.focus();
		return;
	}

	document.frmlogin.submit();
}