如何输入强制性并从99或98开始 [英] How Do I Make Input Mandatory And Start With A 99 Or 98

问题描述

我目前有下面的代码强制数字输入，但我如何确保有一些输入，并以98或99开头。



< pre lang =xml> < script >
<！ -
function isNumberKey（evt）
{
var charCode =（evt.which）？ evt.which：evt.keyCode;
if（charCode！= 46&& charCode> 31
&&（charCode< 48 || charCode> 57））
返回false;

返回true;
}
// - >
< / script >

表格为

  <  表格   方法  = 发布    action   =  insurance / >  
 <   span     class   = 输入输入 -  fumi >  
 <   input     class   =  input__field input__field  -  fumi    onkeypress   =  return isNumberKey（event）    type   =  text    maxlength   =  11     id   = < span class =code-keyword> input-25    /  >  
 <   label     class   =  input__label input__label  -  fumi      =  input-25 >  
 <   i     class   =  fa fa-fw fa-credit-card图标图标 -  fumi >  <   / i  >  
 <   span     class   =  input__label- content input__label-content  -  fumi > 会员编号<   / span  >  
 <   / label  >  
 <   / span  >  
 <  按钮    type   = 提交    class   =  btn-next > 下一步<   / button  >  

预先感谢您的帮助

解决方案

HTML 5支持模式和数字类型：

 <  输入   类型  = 数字   名称  =  country_code    pattern   =  ^ [（99）（98）]（\\ \\ n *）

title < span class =code-keyword> = 以99或98开头的数字 > < / input >

注意：Internet Explorer 9及更早版本或Safari中不支持输入标记的pattern属性。

I currently have the code below which is forcing numerical input but how do i ensure there is some input and that is starts with a 98 or 99.

<script>
<!--
       function isNumberKey(evt)
       {
          var charCode = (evt.which) ? evt.which : evt.keyCode;
          if (charCode != 46 && charCode > 31
            && (charCode < 48 || charCode > 57))
             return false;

          return true;
       }
       //-->
</script>

With the form being

<form method="post" action="insurance/">
            <span class="input input--fumi">
                    <input class="input__field input__field--fumi" onkeypress="return isNumberKey(event)" type="text" maxlength="11" id="input-25" />
                    <label class="input__label input__label--fumi" for="input-25">
                        <i class="fa fa-fw fa-credit-card icon icon--fumi"></i>
                        <span class="input__label-content input__label-content--fumi">Membership Number</span>
                    </label>
                </span>
            <button type="submit" class="btn-next">Next</button>

Thanks in advance for your help

解决方案

HTML 5 supports pattern and number type:

<input type="number" name="country_code" pattern="^[(99)(98)](\d*)

" title="number starting with 99 or 98"></input>

Note: The pattern attribute of the input tag is not supported in Internet Explorer 9 and earlier versions, or in Safari.

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