Determine whether to enable cookies
<script> function checkCookie() { var result=false; if(navigator.cookiesEnabled){ return true; } document.cookie = "testcookie=yes;"; var setCookie = document.cookie; if (setCookie.indexOf("testcookie=yes") > -1){ result=true; }else{ document.cookie = ""; } return result; } if(!checkCookie()){ alert("对不起,您的浏览器的Cookie功能被禁用,请开启"); }else{ alert("Cookie 成功开启"); } </script>
Operation cookie
// 1. 设置COOKIE // 简单型 function setCookie(c_name,value,expiredays) { var exdate=new Date() exdate.setDate(exdate.getDate()+expiredays) document.cookie=c_name+ "=" +escape(value)+ ((expiredays==null) ? "" : ";expires="+exdate.toGMTString()) } // 完整型 function SetCookie(name,value,expires,path,domain,secure) { var expDays = expires*24*60*60*1000; var expDate = new Date(); expDate.setTime(expDate.getTime()+expDays); var expString = ((expires==null) ? "" : (";expires=”+expDate.toGMTString())) var pathString = ((path==null) ? "" : (";path="+path)) var domainString = ((domain==null) ? "" : (";domain="+domain)) var secureString = ((secure==true) ? ";secure" : "" ) document.cookie = name + "=" + escape(value) + expString + pathString + domainString + secureString; } // 2.获取指定名称的cookie值: function getCookie(c_name) { if (document.cookie.length>0) { c_start=document.cookie.indexOf(c_name + "=") if (c_start!=-1) { c_start=c_start + c_name.length+1 c_end=document.cookie.indexOf(";",c_start) if (c_end==-1) c_end=document.cookie.length return unescape(document.cookie.substring(c_start,c_end)) } } return "" } // 3.删除指定名称的cookie: function ClearCookie(name) { var expDate = new Date(); expDate.setTime(expDate.getTime()-100); document.cookie=name+”=;expires=”+expDate.toGMTString(); } // 4. 检测cookie: function checkCookie() { username=getCookie('username') if (username!=null && username!="") {alert('Welcome again '+username+'!')} else { username=prompt('Please enter your name:',"") if (username!=null && username!="") { setCookie('username',username,365) } } }
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