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脚本说明:
把如下代码加入<body>区域中
<script language="javascript">
function do_totals1()
{
document.all.pleasewaitScreen.style.pixelTop = (document.body.scrollTop + 50);
document.all.pleasewaitScreen.style.visibility="visible";
window.setTimeout('do_totals2()',1);
}
function do_totals2()
{
lengthy_calculation();
document.all.pleasewaitScreen.style.visibility="hidden";
}
function lengthy_calculation()
{
var x,y
for(x=0;x<1000000;x++)
{
y += (x * y) / (y - x);
}
}
</script>
<DIV ID="pleasewaitScreen" STYLE="position:absolute;z-index:5;top:30%;left:42%;visibility:hidden">
<TABLE BGCOLOR="#000000" BORDER="1" BORDERCOLOR="#000000" CELLPADDING="0" CELLSPACING="0" HEIGHT="100" WIDTH="150" ID="Table1">
<TR>
<TD WIDTH="100%" HEIGHT="100%" BGCOLOR="silver" ALIGN="CENTER" VALIGN="MIDDLE">
<FONT FACE="Arial" SIZE="4" COLOR="blue"><B>正在处理中<br>
请稍等...</B></FONT>
</TD>
</TR>
</TABLE>
</DIV>
<p align="center">
<input type="button" name="btn_calc" value="处理等待" onclick="do_totals1()">
</p>
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2007-8-21 
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