Getting Input from a User

Prompt Boxes

The basic javascript syntax for a prompt box is:

<script language="Javascript">
prompt("Prompt Box question","Default Value")
</script>



All right, now you ask how to get information from the prompt box and store it in the variable. The syntax for that is found below:

<script language="Javascript">
var name = prompt("What is your name","Type Name Here");
</script>

Now, there are two things that you need to know here. The "var name" parts simultaneously declares a variable called name and assigns it to the value of whatever is put in the prompt box. Also, notice the semicolon (;) after the prompt box line. This is standard syntax when declaring a variable.

Great, so now you have this variable called name with a user's name in it. Now you want that name to be displayed in a text box. This is how it is done:

<form name="myform">
<input name="mytext" type="Text" size="50">
<input type="button" onclick="input()" value="Go">
</form>

I first created a form with the standard form, input box, and submit button with the standard syntax. Now, in the onclick event, I made the button execute the input() function which is below:

<script>
function input()
{
var name=prompt("What is your name?","Type Name Here");
document.myform.mytext.value=name;
}
</script>

All I did here was tell the button to put the value of the variable name into the value of the "mytext" input box using the document.myform.mytext.value=name;. This is self-explanatory syntax and would be trivial to explain it. Below is a little thing I put together for you guys. That's it, have fun with prompt boxes and input!