Untitled

<script type="text/javascript">
<!--
function redirectlink(text){
    window.location = "index.php?keyName="+ text;
}
//-->
</script>

<form>

  <button  type="button" id="butt_1"  onclick="redirectlink(KEY_POWER)"> 1 </button>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <button id="foo">Click</button>
    <script type="text/javascript">
        document.getElementById("foo").addEventListener("click", function(){
            window.location.replace("http://stackoverflow.com/q/36933820/5526354")
        })
    </script>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <button id="foo" onclick="action()">Click</button>
    <script type="text/javascript">
        function action(){
            window.location.replace("http://stackoverflow.com/q/36933820/5526354")
        }
    </script>
</body>
</html>