JavaScript实现载入页面进度条

<form name=loading>
<p align=center> <font color="#ff0000" size="2" face="Arial">载入中，请稍等...</font><br>
<input type=text name=chart size=46 style="font-weight: bolder; color: #ff0000;">
<br>
<input type=text name=percent size=47 style="color: #ff0000;">
<script language="JavaScript">
<!-- 
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.href = "http://www.sina.com.cn";} 
}
//-->
</script>
</p>
</form>

资料来源：

http://blog.csdn.net/sangliu/article/details/8718685