How do i validate a form before it is actually submitted.

My problem comes from using a fileupload object that require processing on anew page.
I wish though to remain with my form if the user doesnt make an entry.

I dont however want to se the alert message hwoever, just simply put an asterix or something next to the wrongly emtered field.

hwo do i do this
cheers

You need to attach something to the onClick event of the button, i.e. your validation function. If the validation fails, the function should return False and then the form won't get submitted.

An easier way is to switch to ASP.NET and use validation controls. They will handle both server and client side validation for you, and will make sure that if JavaScript isn't available on the client, that validation still occures on the server. It's as easy as:
<asp:RequiredFieldValidator id="rfvName" runat="server" ControlToValidate="txtName" ErrorMessage="*" Display="Dynamic" />

OK thanks that great.
cheers for your input

Steve