请教这段内容如何用正则 进行匹配
$s=<<<html <form class="formclass" id="loginform" method="post" onsubmit="return loginform();"> <div style="padding-bottom:5px">Username</div> <div style="padding-bottom:5px"><input type="text" name="username" style="width:180px"></div> <div style="padding-bottom:5px">Password</div> <div style="padding-bottom:5px"><input type="password" name="password" style="width:180px"></div> <div style="padding-bottom:5px"><div style="padding:5px 0px"><a href="javascript:void(0);" onclick="captchareload2();"><img src="modules/captcha/captcha.php?r=login" id="captchaimglogin" border="0"></a></div> <script>function captchareload2(){ $("#captchaimglogin").attr('src','modules/captcha/captcha.php?r=login&x=34&y=75&z=119&?newtime=' + (new Date()).getTime()); }</script></div> <div style="padding-bottom:5px"><input type="text" name="captcha" id="captcha_login" style="width:180px"></div> <div style="padding-bottom:5px"><input type="submit" name="login" value="Login" class="orange"></div> </フォーム> html; preg_match('/<div style="padding-bottom:5px"><div style="padding:5px 0px">.+(?=javascript:void(0)).+</script> </div>/s',$s,$m); print_r($m); <div class="clear"></div>