How to validate default value in texfield using java Script?

Question

In JSP textfield i set default value for eg..(enter your name). while submitting without any changes to textfield the default value should not go, but null or empty value should go how to do this using Javascript...

Answer 1

Put an "id" in your text field. (id="txtfld")

In javascript, BEFORE submitting the form, call this:

var tf = document.getElementById("txtfld");

var txt = tf.value;

if (txt == "enter your name")

{

alert ("you must fill the text area");

tf.focus();

return;

}

...

Answer 2

Did you use the placeholder attribute instead of pre-setting the value attribute of the input element? Probably not. Do this instead:







This won't get submitted with the form.



The form will, by default, submit with null or empty values.

Answer 3

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