(转)javascript控制COOKIE应用一例

妖狐艹你老母 2022-08-25 12:51 169阅读 0赞

本文转自:http://hi.baidu.com/crp8/blog/item/a1989eb10109845709230202.html

javascript控制COOKIE应用一例

给个例子。  
1.LOADING页读取COOKIE判断是否第一次打开首页，如果是就跳转到a.htm，a.htm过渡动画后跳转首页并写入COOKIE，如果不是就打开首页。  
2.按下清除COOKIE按钮后清除COOKIE 。

首页JS:

< script language = " javascript "  type = " text/javascript " >   
 // \--首页   
 findCookie( " visited " )  
 // \--- 判断cookie   
 function  findCookie(sName) \{  
 if  (getCookie(sName)  !=  null ) window.location.href  =  " 首页 " ;  
 else  window.location.href  =  " 过渡页 " ;  
\}  
 // \--- 获取cookie   
 function  getCookie(sName) \{  
 var  aCookie  =  document.cookie.split( " ;  " );  
 for  ( var  j = 0 ; j  <  aCookie.length; j \++ )\{  
 var  aCrumb  =  aCookie\[j\].split( " = " );  
 if  (escape(sName)  ==  aCrumb\[ 0 \] &&  aCrumb\[ 1 \] == " true " )  
 return  true ;  
\}  
 return  null ;  
\}  
 </ script >

过渡页JS

< script language = " javascript "  type = " text/javascript " >   
 // \--过渡页   
 setCookie( " visited " , " true " , 24 ) // 设置过期时间24小时   
// setCookie("visited","true")//不设置过期时间   
//  \--- 设置cookie   
 function  setCookie(sName,sValue,expireHours) \{  
 var  cookieString  =  sName  \+  " = "  \+  escape(sValue);  
 if  (expireHours > 0 ) \{  // 设置过期时间   
  var  date  =  new  Date();  
date.setTime(date.getTime  \+  expireHours  \*  3600  \*  1000 ); // 时间单位=毫秒   
  cookieString  =  cookieString  \+  " ; expire= "  \+  date.toGMTString(); //  date.toGMTString()转为GMT时间   
  \}  
document.cookie  =  cookieString; // 写cookie   
 \}  
 </ script >

清除Cookie

< input type = " button "  value = " clearCookie "  onclick = " clearCookie('visited') " >   
 < script language = " javascript "  type = " text/javascript " >   
 // \--清除Cookie   
 function  clearCookie(sName)\{  
 var  date = new  Date();  
 // 将date设置为过去的时间   
 date.setTime(date.getTime() \- 10000 );  
 // 将这个cookie删除   
 document.cookie = sName \+ " =''; expire= " \+ date.toGMTString(); // 写cookie   
 \}  
 </ script >