从url中拿参数和传递参数。正则获取参数

function getQuery() {
        var search = window.location.search;
        var query = {};
        if (search) {
            var str = search.substr(1);
            if (str.indexOf('&') >= 0) {
                var parts = str.split('&');
                for (var i = 0; i < parts.length; i++) {
                    var pair = parts[i].split('=');
                    query[pair[0]] = pair[1];
                }
            } else {
                var pair = str.split('=');
                query[pair[0]]= pair[1];
            }
                return query;
            } else {
                return null;
            }
   }

key = getQuery().postid ;
from= getQuery().update;
alert("postid : " + postid + ',update: ' + fromupdate' );