js获取url的参数和值的N种有效方法

function getParameterByName(name) ?{ ???name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]"); ???var regexS = "[\\?&]" + name + "=([^&#]*)"; ???var regex = new RegExp(regexS); ???var results = regex.exec(window.location.search); ???if(results == null) ?????return ""; ???else ?????return decodeURIComponent(results[1].replace(/\+/g, " ")); ?} ?

function getParameterByName(name) { ?????var match = RegExp(‘[?&]‘ + name + ‘=([^&]*)‘) ?????????????????????.exec(window.location.search); ?????return match && decodeURIComponent(match[1].replace(/\+/g, ‘ ‘)); ?} 

var qs = (function(a) { ?????if (a == "") return {}; ?????var b = {}; ?????for (var i = 0; i < a.length; ++i) ?????{ ?????????var p=a[i].split(‘=‘); ?????????if (p.length != 2) continue; ?????????b[p[0]] = decodeURIComponent(p[1].replace(/\+/g, " ")); ?????} ?????return b; ?})(window.location.search.substr(1).split(‘&‘)); ?

$.urlParam = function(name){ ?????var results = new RegExp(‘[\\?&]‘ + name + ‘=([^&#]*)‘).exec(window.location.href); ?????if (!results) ?????{ ??????????return 0; ??????} ?????return results[1] || 0; ?} ?