必填字段，只能用整数填充 [英] Required field that should be filled only with integers

问题描述

我正在研究一个字段的验证，在该字段中只能用整数填充，并给出是否需要该字段的验证?

I am working upon validation of a field where in the field should be filled only with integers and validation that the field is needed is also given?

我插入了脚本标签，如下所示:

I inserted the script tags as follows:

<script type="text/javascript" src="jquery.numeric.js"></script>
<script>
jQuery(document).ready(function(){
$("#estvalue").numeric({
negative: false 
}, 
function() {
alert("No negative values");
this.value = "";
this.focus(); });
});
  </script>
<input name="Est_Value" id="estvalue" class="regi_input_1" style="width: 150px; height: 25px;" type="text" />

推荐答案

使用HTML5

<input type="number" min="0" />


<input name="Est_Value" id="estvalue" class="regi_input_1" style="width: 150px; height: 25px;" type="number" min="0" />

使用JavaScript进行验证

<input name="Est_Value" id="estvalue" class="regi_input_1" style="width: 150px; height: 25px;" type="text" onkeypress="if ( isNaN( String.fromCharCode(event.keyCode) )){ alert('numbers only'); return false; }" />

工作演示 http://jsfiddle.net/cse_tushar/FEVrB/

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