http://www.jackxiang.com/index.php zh-cn http://www.jackxiang.com/post// jack <xdy108@126.com> Tue, 12 May 2015 02:52:25 +0000 http://www.jackxiang.com/post// ——————————————————————————————————————————————————————————
var a=3.1415926; a = a.toFixed(2);//保留2位但结果为一个String类型 a = parseFloat(a);//将结果转换会float //用一步的话如下 a = parseFloat(a.toFixed(2));

如果出现：ToFixed() Is Not A Function?
TypeError: setTempRature.toFixed is not a function  
var setTempRatureDisplay = setTempRature.toFixed(1);
使用toFixed对小数四舍五入的时候，弹出以下错误提示：

toFixed() is not a function
后来还是在stackoverflow上找到了答案

toFixed isn’t a property of non-numeric variable types. In other words, Low and High can’t be fixed because when you get the value of something in Javascript, it automatically is set to a string type. Using parseFloat() (or parseInt() with a radix, if it’s an integer) will allow you to convert different variable types to numbers which will enable the toFixed() function to work.
var Low = parseFloat($SliderValFrom.val()),
var High = parseFloat($SliderValTo.val());
原来toFixed只能针对数字类型才能使用，所以对于字符类型的要用parseFloat或者parseInt函数先转一下再调用
摘自：http://www.jason-z.com/tofixed-is-not-a-function/
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在客户js中,我们时常会碰到处理这样的小数类型(转换为字符串):

var i = 1234.8700

document.write("i")  //结果:1234.87   我们想要的结果是1234.8700

也就是小数的有效位数为4位.js中有一个处理这种情况的函数,toFixed(小数有效位数).

如:

var i1 = 3456.244280;
alert(i1.toFixed(2)); // 输出 1024.24

var i2 = 3456.24558;
alert(i2.toFixed(2)); // 输出 1024.25

var i3 = 3456.2;
alert(i3.toFixed(2)); // 输出 1024.20

摘自：http://www.cnblogs.com/rainnight/archive/2009/02/10/1387483.html ]]> http://www.jackxiang.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.jackxiang.com/post//#blogcomment