javascript 格式写错了吗，只有几句

[初学额]

<script language="JavaScript">

var s = document.body.clientWidth;

sf = 'http://www.newsite.com/button.php?u='+s;

document.write(sf);

</script>

<script type="text/javascript" src="http://www.newsite.com/button.php?u="+ sf + "&tts=”+sf></script>

很简单的代码，但是button.php 始终无法获取 sf 这个变量的值


肯定是这句错了，但是头都搞大了，实在不知道怎么解决，谁能帮帮我啊
<script type="text/javascript" src="http://www.newsite.com/button.php?u="+ sf + "&tts=”+sf></script>


谢谢！！！！！！

[slwsss]

<script language="JavaScript"> var s = document.body.clientWidth; sf = 'http://www.newsite.com/button.php?u='+s; document.write(sf); document.write(‘<script type="text/javascript" src="http://www.newsite.com/button.php?u=‘+ sf + "&tts=”+sf+’“></script>’); </script>

[Go 旅城通票]

    var s = document.body.clientWidth;

    sf = encodeURIComponent('http://www.newsite.com/button.php?u=' + s);

    document.write('<script type="text/javascript" src="http://www.newsite.com/button.php?u='+ sf + '&tts='+sf+'"><\/script>');

[qq_31182999]

src里面写变量不能识别吧！换成用js代码加载，script.load