JavaScript document.getElementById

If you want to quickly access the value of an HTML input give it an id to make your life a lot easier.
This small script below will check to see if there is any text in the text field "myText". The argument that getElementById requires is the id of the HTML element you wish to utilize

<script defer="defer" type="text/javascript">

function notEmpty()

{

var myTextField = document.getElementById('myText');

if(myTextField.value != "")

alert("You entered: " + myTextField.value)

else

alert("Would you please enter some text?")

}

</script>

<input type='text' id='myText' />

<input type='button' onclick='notEmpty()' value='Form Checker' />