用JS jquery取float型小数点后两位
1. 最笨的办法……. [我就怎么干的.........]
function get()
{
var s = 22.127456 + “”;
var str = s.substring(0,s.indexOf(“.”) + 3);
alert(str);
}
2. 正则表达式效果不错
<scrīpt type=”text/javascrīpt”>
onload = function(){
var a = “23.456322″;
var aNew;
var re = /([0-9]+\.[0-9]{2})[0-9]*/;
aNew = a.replace(re,”$1″);
alert(aNew);
}
</scrīpt>
3. 他就比较聪明了…..
<scrīpt>
var num=22.127456; alert( Math.round(num*100)/100);
</scrīpt>
4.会用新鲜东西的朋友……. 但是需要 IE5.5+才支持。
<scrīpt>
var num=22.127456; alert( num.toFixed(2));
</scrīpt>