如何动态改变input type=submit 的type属性为button

本文介绍了一个简单的JavaScript脚本,该脚本用于动态地更改HTML表单中的提交按钮类型,并将其替换为按钮元素,同时保留其提交功能。通过使用`removeNode`方法移除原始提交按钮并创建新的按钮元素,然后利用`attachEvent`方法为新按钮添加点击事件来实现表单提交。
  1. <form name="form1" action="1.htm">
  2. <input>
  3. <input type="submit" name="t1">
  4. </form>
  5. <script language="JavaScript">
  6. alert(form1.t1.type);
  7. form1.t1.removeNode(true);
  8. var s=document.createElement('INPUT');
  9. s.type='button';
  10. s.value='Submit';
  11. s.attachEvent('onclick',function(){form1.submit()});
  12. form1.appendChild(s);
  13. </script>
### HTML Input Submit Type Usage and Examples The `input` element with the attribute `type="submit"` represents a button that submits the form data to the server. When placed within a `<form>` tag, clicking on this button will send all of the information contained in the form fields back to the URL specified by the action attribute. A typical use case involves creating an interactive web page where users can enter their details into various inputs like text boxes or checkboxes before submitting them for processing. Here's how one might structure such code: ```html <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Form Submission Example</title> </head> <body> <form action="/submit_form" method="post"> <label for="username">Username:</label><br/> <input type="text" id="username" name="username"/><br/><br/> <label for="password">Password:</label><br/> <input type="password" id="password" name="password"/><br/><br/> <!-- Submit Button --> <input type="submit" value="Submit"/> </form> </body> </html> ``` When designing forms, developers should ensure they follow best practices regarding accessibility and usability standards while adhering strictly to specifications outlined in documents declaring document types like <!DOCTYPE html>, which specifies adherence to HTML5 guidelines[^1]. Additionally, when working with these elements, security considerations must always remain paramount. For instance, certain features related to automatic population of file paths have been intentionally disabled across most modern browsers due to potential risks associated with unauthorized access to local files[^2].
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