<input type="number" class="form-control dec2" id="amt" name="amt">
input[type="number"]{
-moz-appearance: textfield;
text-align : right;
}
<script>
$(function(){
$('input.dec2').blur(
function(){
$(this).val(parseFloat($(this).val()).toFixed(2));
}
);
});
</script>
原文:https://www.cnblogs.com/hhb701/p/12133535.html