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>