日期:2014-05-16  浏览次数:20407 次

javascript cookie设置

文章来源:http://www.w3school.com.cn/js/js_cookies.asp

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<html>
<head>
<script type="text/javascript">
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 ""
}

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())

}

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)
??? }
? }
}
</script>
</head>

<body onLoad="checkCookie()">
</body>
</html>

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