<!DOCTYPE html><html><head><title>JS禁止FORM的submit按钮提交</title><meta http-equiv="Content-Type" content="text/html;charset=utf-8"><script type="text/javascript">/***ggh*用JS阻止FORM的<input type="submit" />提交*很有用。既可以使用form的默认提交，又可以对默认提交进行JS干扰.*/function sub(){var content = document.getElementById("content").value;if(content == ""){alert("No empty");}else{alert(content);}}</script></head><body><div><form method="POST" onSubmit="return sub()"><p><textarea id="content"></textarea></p><p><input type="submit" value="Submit" /></p></form></div></body></html>
