js获取cookie值的方法

1、首先JS设置cookie:假设在A页面中要保存变量username的值("jack")到cookie中,key值为name，则相应的JS代码为：document.cookie="name="+username;

2、JS读取cookie:varusername=document.cookie.split(";")[0].split("=")[1];functionsetCookie(name,value){varDays = 30;varexp =newDate();exp.setTime(exp.getTime() + Days*24*60*60*1000);document.cookie = name +"="+ escape (value) +";expires="+ exp.toGMTString();}

3、读取cookiesfunctiongetCookie(name){vararr,reg=newRegExp("(^| )"+name+"=([^;]*)(;|$)");if(arr=document.cookie.match(reg))returnunescape(arr[2]);elsereturnnull;}

4、删除cookiesfunctiondelCookie(name){varexp =newDate();exp.setTime(exp.getTime() - 1);varcval=getCookie(name);if(cval!=null)document.cookie= name +"="+cval+";expires="+exp.toGMTString();}setCookie("name","hayden");alert(getCookie("name"));functionsetCookie(name,value,time){varstrsec = getsec(time);varexp =newDate();exp.setTime(exp.getTime() + strsec*1);document.cookie = name +"="+ escape (value) +";expires="+ exp.toGMTString();}functiongetsec(str){alert(str);varstr1=str.substring(1,str.length)*1;varstr2=str.substring(0,1);if(str2=="s"){returnstr1*1000;}elseif(str2=="h"){returnstr1*60*60*1000;}elseif(str2=="d"){returnstr1*24*60*60*1000;}}setCookie("name","hayden","s20");