设置cookie
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;
JS读取cookie:
假设cookie中存储的内容为:name=jack;password=123
则在B页面中获取变量username的值的JS代码如下:
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var username=document.cookie.split( ";" )[0].split( "=" )[1]; //JS操作cookies方法! //写cookies function setCookie(name,value) { var Days = 30; var exp = new Date(); exp.setTime(exp.getTime() + Days*24*60*60*1000); document.cookie = name + "=" + escape (value) + ";expires=" + exp.toGMTString(); } |
读取cookies
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function getCookie(name) { var arr,reg= new RegExp( "(^| )" +name+ "=([^;]*)(;|$)" ); if (arr=document.cookie.match(reg)) return unescape(arr[2]); else return null ; } |
删除cookies
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function delCookie(name) { var exp = new Date(); exp.setTime(exp.getTime() - 1); var cval=getCookie(name); if (cval!= null ) document.cookie= name + "=" +cval+ ";expires=" +exp.toGMTString(); } //使用示例 setCookie( "name" , "hayden" ); alert(getCookie( "name" )); //如果需要设定自定义过期时间 //那么把上面的setCookie 函数换成下面两个函数就ok; //程序代码 function setCookie(name,value,time) { var strsec = getsec(time); var exp = new Date(); exp.setTime(exp.getTime() + strsec*1); document.cookie = name + "=" + escape (value) + ";expires=" + exp.toGMTString(); } function getsec(str) { alert(str); var str1=str.substring(1,str.length)*1; var str2=str.substring(0,1); if (str2== "s" ) { return str1*1000; } else if (str2== "h" ) { return str1*60*60*1000; } else if (str2== "d" ) { return str1*24*60*60*1000; } } //这是有设定过期时间的使用示例: //s20是代表20秒 //h是指小时,如12小时则是:h12 //d是天数,30天则:d30 setCookie( "name" , "hayden" , "s20" ); |