SO - 28562176 - decimal number show

.toFixed(n)

by codeSpy

HTML

<input type="number" id="inputTextbox" />

JavaScript

//alert(10.1000.toFixed(3));

inputTextbox.onblur = function(){
    ShowNumber(this.value);
};

function ShowNumber(num){
    var decimalNumLength = num.split('.')[1].length;
    alert(Number(num).toFixed(decimalNumLength));
}