Question

我还是PHP和JS的新手，但是从我一直在阅读的内容来看，当一个表单有一个 onSubmit 元素时，表单需要来自函数的return true为了执行提交。但是我不能让它工作。

有人可以帮我弄明白我的问题是什么吗？我还在Javascript函数的开头添加了一个随机alert()，但也没有。{/ p>

谢谢！

<HTML>
<HEAD>


<script type="text/javascript">

function Validate(){
    alert("validating..");
    var min=document.forms["myForm"]["minWeight"].value;
    var max=document.forms["myForm"]["maxWeight"].value;

if (min < max)
  {
      return true;
  }
  else 
  {
  alert("Minimum weight " + min + " is not lower than " + max " Maximum weight");
      return false;
  }
}
</script>

</HEAD>
<BODY>

<form name="myForm" action="page2.php" method="post"  onSubmit="return Validate()">
    <p><label>Enter minimum weight: <input type="number" name="minWeight" value="0" min="0" required /></label></p>
    <p><label>Enter maximum weight: <input type="number" name="maxWeight" value="999" min="0" max="999" required /></label></p>
    <p>Select gender:
        <label><input type="radio" name="genderType" value="male" required /> Male</label>
        <label><input type="radio" name="genderType" value="female" /> Female</label>
    </p>
    <p><input type="submit" value="Submit" /></p>
</form>

</BODY>
</HTML>

Answer 1

您的javascript中有拼写错误：

alert("Minimum weight " + min + " is not lower than " + max " Maximum weight");
                                                          ^^^

将其更改为：

alert("Minimum weight " + min + " is not lower than " + max + " Maximum weight");

它应该有效，请参阅example on jsbin。

PHP onSubmit，JS函数不会执行

1 个答案: