启用Numlock时如何获取ASCII值 [英] how to get ASCII values when Numlock is on

问题描述

大家好，
我有一个文本框，我可以验证以仅接受字符串值.但是当Numlock处于打开状态时，它可以接受数字以及字符串值.
我只希望如果启用Numlock，它将不接受数值

代码在这里:

Hello All,
I have a Text Box which I have Validate to accept only string Values.But when Numlock is on it accepts numeric as well as string values.
I want only that if Numlock is on,it will not accept the numeric values

code is here :

<script type="text/javascript" language="javascript">
function isString(keyCode)
{
    return ((keyCode >= 65 && keyCode <= 90) || (keyCode >= 97 && keyCode <= 122) ||keyCode==8 ||keyCode==32)
}
</script>

所以怎么可能

so how it will be possible

推荐答案

尝试此代码.

Try this code.

function isString(textObj) {
   var newValue = textObj.value;
   var newLength = newValue.length;
   var extraChars=". -,";
   var search;
   for(var i = 0; i != newLength; i++) {
      aChar = newValue.substring(i,i+1);
      aChar = aChar.toUpperCase();
      search = extraChars.indexOf(aChar);
      if(search == -1 && (aChar < "A" || aChar > "Z") ) {
         return false;
      }
   }
   return true;
}

HTH

HTH

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