输入数字自动添加小数js
<input type="text" onblur="aa(this);" onfocus="this.select()();" /><script type="text/javascript">function aa(obj){var v = obj.value;if(/^\d+$/.test(v)){obj.value = v + ".00";}else if(/^(\d+\.)(\d+)$/.test(v)){var i = RegExp.$1;var t = RegExp.$2;if(t.length == 1)obj.value = v + "0";else if(t.length > 2)obj.value = i + t.substring(0,2);}}</script>
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