}
var passLabel=Label {
text: “LastName”
}
var submit = Button {
text: “Submit”
action: function() {
firstname = text1.text;
lastname = text2.text;
if(firstname.equals(“”) or lastname.equals(“”))
{
laberror.visible=true;
}
else
{
laberror.text=”Incorrect firstname or lastname !”;
laberror.visible=true;
}
if(firstname.equals(“Amit”) and lastname.equals(“Kumar”)){
loginFrame.visible=true;
}
}
}
var panel= FlowPanel{
content:[ submit,Button {
text: “Reset”
action: function() {
text1.text=””;
text2.text=””;
laberror.visible=false;
}
}
]
}
center: FlowPanel{
content:[ userLabel,
text1, passLabel , text2, laberror
]
}
bottom: panel
}
}

Output:

If we “Click” on submit button without filling proper entries that it will show message “Fill Up all entries properly”