正则匹配某字符开始某字符结束并替换

结论

a.*?b 就是 a 开始 b 结束的匹配
如果要限制是一行的开头和末尾的话，就是 ^a.*?b$

实例

原字符

aaa javascript:LUI.pageOpen('/ekp/sys/profile/index.jsp#app/ekp/km/review','_blank'); ccc

或者

aaa javascript:LUI.pageOpen('/ekp/sys/profile/index.jsp#app/ekp/sys/task','_blank'); ccc

需要替换成 aaa bbb ccc

<script type="text/javascript">
    var item = "aaa javascript:LUI.pageOpen('/ekp/sys/profile/index.jsp#app/ekp/km/review','_blank'); ccc";
    // var item = aaa javascript:LUI.pageOpen('/ekp/sys/profile/index.jsp#app/ekp/sys/task','_blank'); ccc
    var curl = window.location.href;
    var replaceText = "javascript:showTipWindow('"+curl+"');";
    var result = item.replace(/javascript:LUI.pageOpen\(\'\/.*sys\/profile.*?_blank\'\);/,replaceText);
    document.write(result);

    window.showTipWindow = function(url){
        alert(url);
    }
</script>