這些天做的一個項目，要求根據業務的邏輯，在某些特定的用戶登錄系統時，給出一個特定的消息提示，於是想到在有的網站看到的類似msn的提示效果，覺得挺酷的，於是決定也採用這種提示效果。
在網上找到很多有關實現類似效果的文章和代碼，我也選了其中的一篇。雖然沒有完全能實現我的需求，但是對於簡單的內容不變化的提示，還是有比較好的效果，給了我一定的啓發，使我最終實現了需求。現將代碼貼在這裏：
<html><head><script language="javascript">window.onload = getMsg;window.onresize = resizeDiv;
window.onerror = function(){}
window.onerror var divTop,divLeft,divWidth,divHeight,docHeight,docWidth,objTimer,i = 0;function getMsg(){
try{
divTop = parseInt(document.getElementById("eMeng").style.top,10)divLeft = parseInt(document.getElementById("eMeng").style.left,10)divHeight = parseInt(document.getElementById("eMeng").offsetHeight,10)divWidth = parseInt(document.getElementById("eMeng").offsetWidth,10)docWidth = document.body.clientWidth;docHeight = document.body.clientHeight;document.getElementById("eMeng").style.top = parseInt(document.body.scrollTop,10) + docHeight + 10;// divHeightdocument.getElementById("eMeng").style.left = parseInt(document.body.scrollLeft,10) + docWidth - divWidthdocument.getElementById("eMeng").style.visibility="visible"objTimer = window.setInterval("moveDiv()",10)
}catch(e){}
} function resizeDiv(){i+=1if(i>500) closeDiv()try{divHeight = parseInt(document.getElementById("eMeng").offsetHeight,10)divWidth = parseInt(document.getElementById("eMeng").offsetWidth,10)docWidth = document.body.clientWidth;docHeight = document.body.clientHeight;document.getElementById("eMeng").style.top = docHeight - divHeight + parseInt(document.body.scrollTop,10)document.getElementById("eMeng").style.left = docWidth - divWidth + parseInt(document.body.scrollLeft,10)}catch(e){}}function moveDiv(){try{if(parseInt(document.getElementById("eMeng").style.top,10) <= (docHeight - divHeight + parseInt(document.body.scrollTop,10))){window.clearInterval(objTimer)objTimer = window.setInterval("resizeDiv()",1)}divTop = parseInt(document.getElementById("eMeng").style.top,10)document.getElementById("eMeng").style.top = divTop - 1}catch(e){}}function closeDiv(){document.getElementById('eMeng').style.visibility='hidden';if(objTimer) window.clearInterval(objTimer)}</script></head><body><DIV id=eMeng style="BORDER-RIGHT: #455690 1px solid; BORDER-TOP: #a6b4cf 1px solid; Z-INDEX:99999; LEFT: 0px; VISIBILITY: hidden; BORDER-LEFT: #a6b4cf 1px solid; WIDTH: 180px; BORDER-BOTTOM: #455690 1px solid; POSITION: absolute; TOP: 0px; HEIGHT: 116px; BACKGROUND-COLOR: #c9d3f3"><TABLE style="BORDER-TOP: #ffffff 1px solid; BORDER-LEFT: #ffffff 1px solid" cellSpacing=0 cellPadding=0 width="100%" bgColor=#cfdef4 border=0><TBODY><TR><TD style="FONT-SIZE: 12px; BACKGROUND-IMAGE: url(msgTopBg.gif); COLOR: #0f2c8c" width=30 height=24></TD><TD style="FONT-WEIGHT: normal; FONT-SIZE: 12px; BACKGROUND-IMAGE: url(msgTopBg.gif); COLOR: #1f336b; PADDING-TOP: 4px;PADDING-left: 4px" vAlign=center width="100%"> 短消息提示：</TD><TD style="BACKGROUND-IMAGE: url(msgTopBg.gif); PADDING-TOP: 2px;PADDING-right:2px" vAlign=center align=right width=19><span title=關閉 style="CURSOR: hand;color:red;font-size:12px;font-weight:bold;margin-right:4px;" onclick=closeDiv() >×</span></TR><TR><TD style="PADDING-RIGHT: 1px; BACKGROUND-IMAGE: url(1msgBottomBg.jpg); PADDING-BOTTOM: 1px" colSpan=3 height=90><DIV style="BORDER-RIGHT: #b9c9ef 1px solid; PADDING-RIGHT: 13px; BORDER-TOP: #728eb8 1px solid; PADDING-LEFT: 13px; FONT-SIZE: 12px; PADDING-BOTTOM: 13px; BORDER-LEFT: #728eb8 1px solid; WIDTH: 100%; COLOR: #1f336b; PADDING-TOP: 18px; BORDER-BOTTOM: #b9c9ef 1px solid; HEIGHT: 100%">您有<font color=#FF0000>1</font>封新短消息<BR><BR><DIV align=center style="word-break:break-all"><a href="javascript:alert('你好')"><font color=#FF0000>點擊查看短信</font></a></DIV></DIV></TD></TR></TBODY></TABLE></DIV></body></html>類似的大同小異的代碼，在網上廣爲流傳，最初的作者也不得而知。在此我只能感謝他的智慧和無私奉獻！