<SCRIPT language=javascript>
<!--
function test()
{
document.write(Math.floor(5.80) + "<br>");//取整或下舍入
document.write(Math.round(5.80) + "<br>");//四舍五入
document.write(Math.ceil(5.10) + "<br>");//上舍入
document.write(Math.abs(-5.80) + "<br>");//取绝对值
document.write(Math.max(55,58) + "<br>");//返回两个值中最大数
document.write(Math.min(55,58) + "<br>");//返回两个值中最小数
}
-->
</SCRIPT>
<div><script>test();</script></div>