index.php

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<script type="text/javascript">
    function acao(){
        var xmlhttp;
        if(window.XMLHttpRequest){
            xmlhttp = new XMLHttpRequest();
        }else{
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }

        xmlhttp.onreadystatechange = function(){
            if(xmlhttp.readyState == 4 && xmlhttp.status == 200){
                document.getElementById("msg").innerHTML = xmlhttp.responseText;
            }
        }

        xmlhttp.open("GET", "view.php?url="+document.getElementById("website").value+"", true);
        xmlhttp.send();
    }
</script>
</head>

<body>

<form id="form1" name="form1" method="post" action="">
  <table width="338" border="0">
    <tr>
      <td width="66">Website:</td>
      <td width="256"><label for="website"></label>
      <input name="website" type="text" id="website" size="40" /></td>
    </tr>
    <tr>
      <td>&nbsp;</td>
      <td><input type="button" name="btn" id="btn" value="Buscar Thumb" onclick="acao();" /></td>
    </tr>
  </table>
</form>

<div id="msg"></div>
</body>
</html>