This function performs Textbox Validation using Javascript

function validate_form1()
{
valid = true;

if ( document.frm.username.value == "" ) {
alert( "User Name Should Not be Empty." );
document.frm.username.focus();
valid = false;
return valid;
}
if ( document.frm.password.value == "" ) {
alert( "Password Should Not be Empty." );
document.frm.password.focus();
valid = false;
return valid;
}

return valid;
}

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