這里運(yùn)用JavaScript的cookie技術(shù)，控制網(wǎng)頁上的提示DIV只顯示一次，也就是當(dāng)用戶是第一次打開網(wǎng)頁的時(shí)候才顯示，第二次自動(dòng)隱藏起來，很好的提升了用戶體驗(yàn)，不會(huì)使用戶煩感；利用Cookies，我們還可做超多的事情，慢慢體會(huì)吧。

運(yùn)行效果截圖如下：

在線演示地址如下：

http://demo.jb51.net/js/2015/js-cookie-div-dlg-show-once-codes/

具體代碼如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>cookie，只顯示一次的DIV提示框</title>
<style>
.note{height:100px;width:600px;background:url(images/tishi.jpg) #FEFFCF 40px 0px no-repeat;border:#EDCE7B 1px solid;}
.guanbi{float:right;font-size:12px;padding:6px;}
</style>
<script>
function cookiesave(n, v, mins, dn, path)
{
 if(n)
 {
  if(!mins) mins = 365 * 24 * 60;
  if(!path) path = "/";
  var date = new Date();
  date.setTime(date.getTime() + (mins * 60 * 1000));
  var expires = "; expires=" + date.toGMTString();
  if(dn) dn = "domain=" + dn + "; ";
  document.cookie = n + "=" + v + expires + "; " + dn + "path=" + path;
 }
}
function cookieget(n)
{
 var name = n + "=";
 var ca = document.cookie.split(';');
 for(var i=0;i<ca.length;i++) {
  var c = ca[i];
  while (c.charAt(0)==' ') c = c.substring(1,c.length);
  if (c.indexOf(name) == 0) return c.substring(name.length,c.length);
 }
 return "";
}
function closeclick(){
 document.getElementById('note').style.display='none';
 cookiesave('closeclick','closeclick','','','');
}
function clickclose(){
 if(cookieget('closeclick')=='closeclick'){
  document.getElementById('note').style.display='none';
 }else{
  document.getElementById('note').style.display='block';
 }
}
window.onload=clickclose;
</script>
</head>
<body>
<div id="note" class="note" style="display:none;">
 <div><a href="#" onclick="closeclick()" class="guanbi"><img src="images/close-note.gif" border="0" /></a></div>
</div>
</body>
</html>

希望本文所述對(duì)大家JavaScript程序設(shè)計(jì)有所幫助。

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