这些天做的一个项目,要求根据业务的逻辑,在某些特定的用户登录系统时,给出一个特定的消息提示,于是想到在有的网站看到的类似msn的提示效果,觉得挺酷的,于是决定也采用这种提示效果。
在网上找到很多有关实现类似效果的文章和代码,我也选了其中的一篇。虽然没有完全能实现我的需求,但是对于简单的内容不变化的提示,还是有比较好的效果,给了我一定的启发,使我最终实现了需求。现将代码贴在这里:
<html>
<head>
<script language="javascript">
window.onload = getMsg;
window.onresize = resizeDiv;

window.onerror = function()...{}

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;// divHeight
document.getElementById("eMeng").style.left = parseInt(document.body.scrollLeft,10) + docWidth - divWidth
document.getElementById("eMeng").style.visibility="visible"
objTimer = window.setInterval("moveDiv()",10)
}

catch(e)...{}
}

function resizeDiv()

...{
i+=1
if(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=关闭 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>点击查看短信</font></a></DIV>
</DIV>
</TD>
</TR>
</TBODY>
</TABLE>
</DIV>

</body>
</html>
类似的大同小异的代码,在网上广为流传,最初的作者也不得而知。在此我只能感谢他的智慧和无私奉献!