Intro to form elements

inputs

type	example	script
reading an input field from within a form		<form> <input name="yep"><br> <input type="button" value="go" onclick="alert(yep.value)"> </form>
reading an input field unsuccessfully from outside the form		<form> <input name="yep"></form> <form> <input type="button" value="go" onclick="alert(yep.value)"> </form>
reading an input from elsewhere in the document, successfully		<form name="a"> <input name="yep"></form> <form> <input type="button" value="go" onclick="alert(a.yep.value)"> </form>
using input values outside the document		<script>function f( ){ alert(document.b.y.value)}</script> <form name="b"> <input name="y"> <input type="button" value="go" onclick="f()"></form>
listening to an input field		<input name= "a"onkeyup="b.value=a.value">         <input name="b">