Your header
<hr><script><!--
var sdsubmit=1
function validateForm(form) {
if (sdsubmit){
	urlstr = new String()
	urlstr.value = form.url.value
	if ( urlstr.value == "http://"){
		alert("You forgot to type something.")
		form.url.focus()
		return false
	}
	form.submit.value = "Please wait..."
	form.submit.blur()
	sdsubmit=0
}
else {return false}
}
//--></script>

<form method="GET" action="addlink_lwp.cgi" onSubmit="return validateForm(this)" name="f">

<div align="center"><center>Your Site's URL: <input type="text" name="url" value="" size="23"> <input type="submit"
      value="  Submit  " name="submit">
  </center></div>
</form>
<hr>
Your footer