本文介绍了验证失败时防止表单提交的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
验证失败时如何防止提交此内容?我不知道在 validateForm
函数中输入什么...我有这样的表格:
How do I prevent this from submission when validation fails? I don't know what to put in the validateForm
function... I have this form:
<form action="ChangePassword" method="POST">
<input type="submit" value="Change Password" onclick="validateForm();"/>
</form>
validateform
函数:
<script>
function validateForm() {
if(document.getElementById("passError").innerHTML !== "") {
alert("There are some errors.");
return false;
}
}
</script>
推荐答案
您需要从事件处理函数返回。
You need to return from your event handler function.
您目前只从 validateForm
返回,这是您从事件中调用的函数处理函数。
You are currently only returning from validateForm
which is a function you call from your event handler function.
onclick="return validateForm();"
良好做法是:
- 在提交时执行检查,而不是仅在单击提交按钮时(即在表单上使用
onsubmit
而不是按钮上的onclick 。 - 到,而不是依赖于全局变量和内部事件属性
- to perform the check when it is submitted rather then only when the submit button is clicked (i.e. use
onsubmit
on the form instead ofonclick
on the button). - to bind your event handlers with JavaScript instead of depending on globals and intrinsic event attributes
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