用JS jquery取float型小数点后两位

1. function get()
   
2. {
   
3.     var s = 22.127456 + “”;
   
4.     var str = s.substring(0,s.indexOf(“.”) + 3);
   
5.     alert(str);
   
6. }

2. 正则表达式效果不错

1. 
   
2. <scrīpt type=”text/javascrīpt”>
3. onload = function(){
4.     var a = “23.456322″;
   
5.     var aNew;
   
6.     var re = /([0-9]+\.[0-9]{2})[0-9]*/;
   
7.     aNew = a.replace(re,”$1″);
   
8.     alert(aNew);
   
9. }
10. </scrīpt>

3. 他就比较聪明了…..

1. 
   
2. <scrīpt>
3. var num=22.127456;
4. alert( Math.round(num*100)/100);
5. </scrīpt>
6. 4.会用新鲜东西的朋友……. 但是需要 IE5.5+才支持。
7. <scrīpt>
8. var num=22.127456;
9. alert( num.toFixed(2));
10. </scrīpt>