21世纪开运网www.21kaiyun.com用javascript替换URL中的参数值的技巧

今天遇到一个需要用javascript将url中的某些参数替换的需求:

function parseURL(url) {

    var a =  document.createElement('a');

    a.href = url;

    return {

        source: url,

        protocol: a.protocol.replace(':',''),

        host: a.hostname,

        port: a.port,

        query: a.search,

        params: (function(){

            var ret = {},

                seg = a.search.replace(/^\?/,'').split('&'),

                len = seg.length, i = 0, s;

            for (;i<len;i++) {

                if (!seg[i]) { continue; }

                s = seg[i].split('=');

                ret[s[0]] = s[1];

            }

            return ret;

        })(),

        file: (a.pathname.match(/\/([^\/?#]+)$/i) || [,''])[1],

        hash: a.hash.replace('#',''),

        path: a.pathname.replace(/^([^\/])/,'/$1'),

        relative: (a.href.match(/tps?:\/\/[^\/]+(.+)/) || [,''])[1],

        segments: a.pathname.replace(/^\//,'').split('/')

    };

}

用法：

var myURL = parseURL('http://www.21kaiyun.com/default.aspx?id=255&m=hello#top');

myURL.file;     // = 'index.html'

myURL.hash;     // = 'top'

myURL.host;     // = 'abc.com'

myURL.query;    // = '?id=255&m=hello'

myURL.params;   // = Object = { id: 255, m: hello }

myURL.path;     // = '/dir/index.html'

myURL.segments; // = Array = ['dir', 'index.html']

myURL.port;     // = '8080'

myURL.protocol; // = 'http'

myURL.source;   // = 'http://www.21kaiyun.com

取得URL的参数，以对象形式返回！

var getParam = function(path){

    var result = {},param = /([^?=&]+)=([^&]+)/ig,match;

    while((match = param.exec(path)) != null){

        result[match[1]] = match[2];

    }

    return result;

}

Object.keys = Object.keys || function(obj){

    var result = [];

    for(var i in obj){

        if(obj.hasOwnProperty(i)){

            result.push(i)

        }

    }

    return result;

}

var path = "http://www.21kaiyun.com/f?ct=318767104&tn=baiduKeywordSearch&sc=1&pn=0&rn=50&lm=4&rs4=2&rs3=2&word=%D0%C2%BE%D3%D5%D1%C4%CB&frs=jpq";

var r = getParam(path);

alert(Object.keys(r))//ct,tn,sc,pn,rn,lm,rs4,rs3,word,frs