新文章对应访问者上一次访问显示new图片_查看图片出现new document-优快云博客

本文链接：https://blog.youkuaiyun.com/huangbaokang/article/details/80533588

<body>
 <p>Negrino and Smith's most recent books:</p>
 <p id="New-20110801"><a href="http://www.javascriptworld.com">JavaScript:Visual QuickStart Guide,
 <sup>th </sup> Edition</a></p>
 <p id="New-20100601"><a href="http://www.dreamweaverbook.com">Dreamweaver CS5: Visual QuickStart Guide</a></p>
</body>

body {
 background-color: #FFF;
}
p.newImg {
 padding-left: 35px;
 background-image: url(images/new.gif);
 background-repeat: no-repeat;
}

window.onload = initPage;
function initPage() {
 var now = new Date();
 var lastVisit = new Date(cookieVal("pageVisit"));
 var expireDate = new Date();
 expireDate.setMonth(expireDate.getMonth()+6);

 document.cookie = "pageVisit=" + now + ";expires=" + expireDate.toGMTString();
 var allGrafs = document.getElementsByTagName("p");

 for (var i=0; i<allGrafs.length; i++) {
 if (allGrafs[i].id.indexOf("New-") != -1) {
 newCheck(allGrafs[i],allGrafs[i].id.substring(4));
 }
 }
 function newCheck(grafElement,dtString) {
 var yyyy = parseInt(dtString.substring(0,4),10);
 var mm = parseInt(dtString.substring(4,6),10);
 var dd = parseInt(dtString.substring(6,8),10);
 var lastChgd = new Date(yyyy,mm -1,dd);

 if (lastChgd.getTime() > lastVisit.getTime()) {
 grafElement.className += " newImg";
 }
 }
}
function cookieVal(cookieName) {
 var thisCookie = document.cookie.split("; ");

 for (var i=0; i<thisCookie.length; i++) {
 if (cookieName == thisCookie[i].split("=")[0]) {
 return thisCookie[i].split("=")[1];
 }
 }
 return "1 January 1970";
}