regex101: example

Regular Expression

<script>.*?(var.*?;).*?</script>

New

<script><!--
var STATIC_BASE = '//cdn1.editmysite.com/';
var STYLE_PREFIX = 'wsite';
//-->
</script>
<script src='https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js'></script>
<script src='//cdn2.editmysite.com/js/site/main.js?buildTime=1400799662'></script>
<script>_W.relinquish && _W.relinquish()</script>
<script type='text/javascript'><!--
(function(jQuery){
function initFlyouts(){initPublishedFlyoutMenus([{"id":"408147401478827578","title":"HOME","url":"index.html","target":""},{"id":"852985120278826572","title":"GET A DOMAIN","url":"get-a-domain.html","target":""},{"id":"745935904556716097","title":"SERVICES","url":"services.html","target":""},{"id":"505441827833699923","title":"MY ACCOUNT","url":"my-account.html","target":""},{"id":"464549931862712377","title":"ABOUT US","url":"about-us.html","target":""}],"408147401478827578","<li><a href='#'>{{title}}<\/a><\/li>",'active',false)}
if (jQuery) {
if (jQuery.browser.msie && !window.flyoutMenusRefreshable) window.onload = initFlyouts;
else jQuery(initFlyouts);
}else{
if (Prototype.Browser.IE) window.onload = initFlyouts;
else document.observe('dom:loaded', initFlyouts);
}
})(window._W && _W.jQuery)
//-->
</script>
</head>
<body class='  wsite-theme-light wsite-page-index'>
<div id="fb-root"></div>
<script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); js.id = id;
  js.src = "//connect.facebook.net/en_US/sdk.js#xfbml=1&appId=109188665774734&version=v2.0";
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
<div id="nav-fixed">
 <div id="nav-body">
 <span style="visibility:hidden">Pwns.me</span> <ul class='wsite-menu-default'><li id='active'><a href='/'>HOME</a></li><li id='pg852985120278826572'><a href='/get-a-domain.html'>GET A DOMAIN</a></li><li id='pg745935904556716097'><a href='/services.html'>SERVICES</a></li><li id='pg505441827833699923'><a href='/my-account.html'>MY ACCOUNT</a></li><li id='pg464549931862712377'><a href='/about-us.html'>ABOUT US</a></li></ul>
 </div>
</div>
<div id="pwns-logo">
<span style="display:hidden;" david="gay"></span>
</div>
<div id="content-body">
<div id="titleImg">
<img src="/files/theme/middlef.png">
</div>
<div id="que">
<ul>
<li><a href="about-us.html">QUE?</a> </li>
<li><a href="get-a-domain.html">SEEMS LEGIT</a> </li>
</ul>
</div>

</div>

<div id="social">
<div class="fb-like" data-href="http://pwns.me" data-layout="button" data-action="like" data-show-faces="false" data-share="false"></div><br><br>
<a href="https://twitter.com/share" class="twitter-share-button" data-url="http://pwns.me" data-text="Pwns.me - Awesome domains" data-count="none" data-hashtags="pwns">Tweet</a>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
</div>

<div id="myFooter"> Brought to you by Awesomness. </div>
<div style="display:none;">
<div><div class='wsite-elements wsite-footer'>
<div><div class="wsite-multicol"><div class='wsite-multicol-table-wrap' style='margin:0 -15px'>
<table class='wsite-multicol-table'>
<tbody class='wsite-multicol-tbody'>
<tr class='wsite-multicol-tr'>
<td class='wsite-multicol-col' style='width:50%;padding:0 15px'></td>
<td class='wsite-multicol-col' style='width:50%;padding:0 15px'></td>
</tr>
</tbody>
</table>
</div></div></div>

<div class="weebly-footer" style="text-align:right;"><div style="height:10px;overflow:hidden"></div>
Proudly powered by <a href="http://www.weebly.com/?utm_source=internal&utm_medium=footer&utm_campaign=2" href="_blank">Weebly</a>
<div style="height:10px;overflow:hidden"></div></div></div>
<script type='text/javascript'>
<!--

if (document.cookie.match(/(^|;)\s*is_mobile=1/)) {
 var windowHref = window.location.href || '';
 if (windowHref.indexOf('?') > -1) {
   windowHref += '&';
 } else {
   windowHref += '?';
 }
 document.write(
   "&nbsp;&nbsp;&nbsp;&nbsp;" +
   "<a class='wsite-view-link-mobile' href='" + windowHref + "view=mobile'>Mobile Site</a>"
 );
}