js 获取根目录 获取参数

function getRootPath() {
//获取当前网址，如： http://localhost:8083/uimcardprj/share/meun.jsp
var curWwwPath = window.document.location.href;
//获取主机地址之后的目录，如： uimcardprj/share/meun.jsp
var pathName = window.document.location.pathname;
var pos = curWwwPath.indexOf(pathName);
//获取主机地址，如： http://localhost:8083
var localhostPaht = curWwwPath.substring(0, pos);
//获取带"/"的项目名，如：/uimcardprj
var projectName = pathName.substring(0, pathName.substr(1).indexOf('/') + 1);
return (localhostPaht + projectName);
}
function GetQueryString(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
var r = window.location.search.substr(1).match(reg);
if (r != null) return unescape(r[2]); return null;
}