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 ::   Introduction to Microsoft DNA

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 ::   Introduction to Java (Parts 1 and 2) in Slovak


introduction to web programming
The Button Widgets  
So now you have all of these cool interface widgets with which you can collect user-defined input. But what do you do with them?

Well, at the end of your HTML FORM, you typically add a "SUBMIT BUTTON".

Submit buttons are easy to implement and take care of themselves.

When the user clicks the submit button, the browser will detect it and will put all the inputted data from the interface widgets into a URL encoded string and send it to the script specified in the FORM's ACTION attribute (again, we will talk about the script tomorrow).

A submit button appears below:

The code to create it looks like the following:

Changing the Buttons Label  
You can notice right away that by default, the web browser will use something like "Submit Query" for the button's label.

In many cases, you will not want that default text in the button.

To change it, you simply use the VALUE attribute of the INPUT tag as follows

The code to create it looks like the following:

<INPUT TYPE = "SUBMIT" VALUE = "Oooooh, Touch me!">
Identifying the Button to the Server  
In many cases, you may have more than one submit button in a form. Thus, you need a way of identifying which submit button is being pressed.

To do so, you will use the NAME attribute of the INPUT tags.

In the following example, we create two submit buttons with different names:

The code to create it looks like the following:

    <INPUT TYPE = "SUBMIT" VALUE = "Delete Item"
              NAME = "delete">
    <INPUT TYPE = "SUBMIT" VALUE = "Modify Item"
              NAME = "modify">

We will talk about how the server can use this information tomorrow.

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