用js获取basePath

/**
 * Created by Administrator on 2015/10/31.
 * 
 * 实现类似jsp中<%=basePath%>的功能,获取项目根目录有助于url的填写
 * 
 * 使用方法,用类似引用jQuery的方法引入本插件
 * 
 * 定义一个全局的变量,然后的ready方法内部掉用本方法,获得basePath
 */


 function basePath(){
    //获取当前网址,如: http://localhost:8080/ems/Pages/Basic/Person.jsp
    var curWwwPath = window.document.location.href;
    //获取主机地址之后的目录,如: /ems/Pages/Basic/Person.jsp
    var pathName = window.document.location.pathname;
    var pos = curWwwPath.indexOf(pathName);
    //获取主机地址,如: http://localhost:8080
    var localhostPath = curWwwPath.substring(0, pos);
    //获取带"/"的项目名,如:/ems
    var projectName = pathName.substring(0, pathName.substr(1).indexOf('/') + 1);
    //获取项目的basePath   http://localhost:8080/ems/
    var basePath=localhostPath+projectName+"/";
    return basePath;
};

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