只弹出一次提示的弹出窗口Js代码

2024-09-05 12:18:35

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只弹出一次提示的弹出窗口Js代码，本代码允许在指定页面内加入弹出框、弹出窗口，但只能弹出一次，用户刷新页面时候就不再提示，可有效提升网页的浏览体验，JS代码也简单，方便加入到你的页面中。我觉得这是一款非常实用的网页特效哦。

<html><head><title>只弹出一次提示的弹出窗口</title><script language="JavaScript1.2">var ie=document.allvar dom=document.getElementByIdvar ns4=document.layersvar bouncelimit=32 //(must be divisible by 8)var curtopvar direction="up"var boxheight=''function initbox(){if (!dom&&!ie&&!ns4)returncrossobj=(dom)?document.getElementById("dropin").style : ie? document.all.dropin : document.dropinscroll_top=(ie)? document.body.scrollTop : window.pageYOffsetcrossobj.top=scroll_top-250crossobj.visibility=(dom||ie)? "visible" : "show"dropstart=setInterval("dropin()",50)}function dropin(){scroll_top=(ie)? document.body.scrollTop : window.pageYOffsetif (parseInt(crossobj.top)<100+scroll_top)crossobj.top=parseInt(crossobj.top)+40else{clearInterval(dropstart)bouncestart=setInterval("bouncein()",50)}}function bouncein(){crossobj.top=parseInt(crossobj.top)-bouncelimitif (bouncelimit<0)bouncelimit+=8bouncelimit=bouncelimit*-1if (bouncelimit==0){clearInterval(bouncestart)}}function dismissbox(){if (window.bouncestart) clearInterval(bouncestart)crossobj.visibility="hidden"}function get_cookie(Name) {var search = Name + "="var returnvalue = ""if (document.cookie.length > 0) {offset = document.cookie.indexOf(search)if (offset != -1) {offset += search.lengthend = document.cookie.indexOf(";", offset)if (end == -1)end = document.cookie.length;returnvalue=unescape(document.cookie.substring(offset, end))}}return returnvalue;}function dropornot(){if (get_cookie("droppedin")==""){window.onload=initboxdocument.cookie="droppedin=yes"}}dropornot()</script></head><body><div id="dropin" style="position:absolute;visibility:hidden;left:250;top:100;width:500;height:300;background-color:#F5F5F5"><div align="right">[关闭窗口] </div>这是只显示一次，再次刷新就不显示了！</div></body></html>

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