看看这个页面的预载效果：
http://www.windstudio.net/html/sample/loading.htm
源程序如下：
<html>
<head>
<title>正在载入...</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFFFFF" leftmargin="0" topmargin="0">
<table border=0 cellpadding=0 cellspacing=0 width="100%" height="100%">
<tr>
<form name=loading>
<td align=center>
<p><font color=gray>正在载入......</font></p>
<p>
<input type=text name=chart size=46 style="font-family:Arial; font-weight:bolder; color:gray; background-color:white; padding:0px; border-style:none;">
<br>
<input type=text name=percent size=46 style="font-family:Arial; font-size:12px; color:gray; text-align:center; border-width:medium; border-style:none;">
<script>var bar = 0
var line = "||"
var amount ="||"
count()
function count(){
bar= bar+2
amount =amount + line
document.loading.chart.value=amount
document.loading.percent.value=bar+"%"
if (bar<99)
{setTimeout("count()",100);}
else
{window.location = "http://www.windstudio.net";}
}
</script>
</p>
</td>
</form>
</tr>
</table>
</body>
</html>
把里面的“http://www.windstudio.net”替换成你需要载入的页面的URL即可，需要声明的是：这个效果并非真实的预载，只是一种表象而已^_^