How to show alert message for textbox empty

Question

1.00/5 (1 vote)

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i want to show alert massage for when the text skip

What I have tried:

JavaScript

function userValid() {
    var Description;
    Description = document.getElementById("TxtDescription").value;

    if (Description == "") {
        alert("Please Mention at Description");
        return false;
    }
    return true;
}

Posted 31-May-16 1:28am

ramesh arunchalam

Updated 31-May-16 23:49pm

George Jonsson

v2

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Comments

ZurdoDev 31-May-16 8:04am

And what is your question?

ramesh arunchalam 1-Jun-16 5:42am

Sorry for the late,when i click the submit button with blank textbox field,i want show alert or warning massage in browser.can't click without text by user..,

ZurdoDev 1-Jun-16 6:40am

I know. You already explained that part. And you have code to do what you want so what is your question?

Karthik_Mahalingam 31-May-16 8:56am

"text skip" meaning tab press or button click ?

ramesh arunchalam 1-Jun-16 5:43am

Button.,

Karthik_Mahalingam 1-Jun-16 5:46am

post the code for button

asp button or html button ?

ramesh arunchalam 1-Jun-16 5:53am

asp

Karthik_Mahalingam 1-Jun-16 6:00am

check solution 3

1 solution

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Karthik_Mahalingam · Answer 1 · 2016-05-31T23:49:00

try this, for asp

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script type="text/javascript">
        function userValid() {
            var Description = document.getElementById("<%= TxtDescription.ClientID %>");
            if (Description.value == "") {
                alert("Please Mention at Description");
                Description.focus();
                return false;
            }
            return true;
        }
    </script>

</head>
<body>
    <form id="frm" runat="server">
        <asp:TextBox runat="server" ID="TxtDescription" />
        <asp:Button Text="Save" OnClientClick="return userValid();" runat="server" />
    </form>
</body>
</html>