In combination with the JavaScript authority guide and the information collected on the Internet during the development of the project, two methods of setting and obtaining cookies are summarized.

<script>
//Cookie  Settings; Methods a
function setCookie(name,value){
　　var exp = new Date();
　　exp.setTime(exp.getTime() + 1*60*60*1000);//Valid for 1 hour
　　document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();
}

//Cookie setting method 2 stores cookies directly
document.cookie = "homepage = //www.jb51.net";
 
//Take the cookie function method one
function getCookie(name){
　　var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
　　if(arr != null)　　　　
　　　　return unescape(arr[2]);
　　return null;
}
//Cookies & cake; Method 2
function getCookie(key){
　　if(key==null)
　　　　return null;
　　if(Object.prototype.toString.call(key)=='[object String]'|| Object.prototype.toString.call(key)=='[object Number]')
　　{
　　　　var arrStr = document.cookie.split(";");
　　　　for(var i= 0;i<arrStr.length;i++){
　　　　var temp = arrStr[i].split("=");
　　　　if(temp[0]==key)
　　　　　　return unescape(temp[1]);
　　　　}
　　　　return null;
　　}
　　return null;
}
</script>

When learning a lot of js methods will not meet on the Internet to find information, until master.