使用isNan(）函数将参数从html传递给javascript，并检查值然后返回值

using isNan() function to pass parameter to javascript from html and check value then return value

本文关键字：javascript 检查 返回值 然后 isNan 函数 html 参数 使用      更新时间：2023-09-26

我基本上是在尝试让用户输入的值进行检查，并确认它是一个介于10&100，一旦确认存储到变量"num2"中-感谢

<!DOCTYPE html>
<html>
<body>
    <script type ="text/javascript">
    <!--
      function numcheck(pass) {
      var num2 =0;
      isNan()= numcheck(pass);
    if (isNan() == true)
    {
    alert("You can only enter a number in the text field");
    }
    else if (isNan() <=10 || isNan(p) >=100)
    {
    alert ("You must enter a number between 10 and 100");
    }
    else
    num2 = inNan();
    alert ("You have entered var2" + "which has now been stored, thankyou");
    return num2;
     -->
    </script>
    Number: <input type = “text” name = “numcheck” />
    <button onClick="numcheck();"/> Enter </button>
    </body>
    </html>

   <!DOCTYPE html>
   <html>
   <header>
   <script>
  function numcheck() {
  var var2 = document.getElementById('num').value;
       if (isNaN(var2)){
        alert("You can only enter a number in the text field");
        document.getElementById('num').value = "";
        }
        else if ( var2 <=10 || var2 >=100){
        alert ("You must enter a number between 10 and 100");
        document.getElementById('num').value = "";
        }
        else{
            alert("You have entered "+ var2 + " which has now been stored, thankyou!");
            document.getElementById('num').value = "";
        }
    }
   </script>


Number: <input type="text" name="numcheck" id="num" />
<button onclick="numcheck()"/> Enter </button>
</body>
</html>

我不知道确切的问题是什么，但我只是希望它能澄清用户想要什么。

如果您想对javascript try//或/**/

进行注释，<!-- -->也是html注释
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