demo1.html
<html> <head> <title>提交表單頁</title> <script type="text/javascript"> function myCheck() { for(var i=0;i<document.form1.elements.length-1;i++) { if(document.form1.elements[i].value=="") { alert("當前表單不能有空項"); document.form1.elements[i].focus(); return false; } } return true; } </script> </head> <body> <form name="form1" method="post" action="page2.html" onSubmit="return myCheck()"> 用戶名:<input type="text" name="username"><br> 性別:<input type="text" name="sex"><br> 出生時間:<input type="text" name="birthday"><br> <input type="submit" value="提交"> </form> </body></html>demo2.html<script language="Javascript"><!--function submit1(frm){ if (document.frm.word.value=="") { alert("請輸入搜索新聞內容！");document.frm.word.focus();return false;}return true;} //--></script><form method="POST" action="" name="frm" onsubmit="return submit1(this);"><select name="select0"> <option value="0">請選擇一個類別</option><option value="1">新聞</option><option value="2">產品</option><option value="3">留言</option></select><input type="text" name="word" size="20" class="input" style="height:19px; "><input type="radio" name="sea_cat" value="標題">標題 <input type="radio" name="sea_cat" value="內容">內容<input type="submit" value="搜" name="B1" class="input1" >demo3.html
<script type="text/javascript">function beforeSubmit(form){if(form.username.value==''){alert('用戶名不能為空！');form.username.focus();return false;}if(form.password.value==''){alert('密碼不能為空！');form.password.focus();return false;}if(form.password.value.length<6){alert('密碼至少為6位，請重新輸入！');form.password.focus();return false;}if(form.password.value!=form.password2.value) {alert('你兩次輸入的密碼不一致，請重新輸入！');form.password2.focus();return false;}return true;}</script><fieldset> <legend>用戶注冊</legend> <form method="post" name="form" action="user.do?method=register" onSubmit="return beforeSubmit(this);"> <table border="1" width="100%" cellspacing="0" cellpadding="0"> <tr><td><label>用戶名：<input type="text" name="username" value=""></label></td></tr> <tr><td><label>密 碼：<input type="password" name="password" value=""></label></td></tr> <tr><td><label>重復密碼：<input type="password" name="password2" value=""></label></td></tr> <tr><td><input value="注冊" type="submit"> <input type="reset" value="重置"></td></tr> </table> </form></fieldset>以上這篇js判斷所有表單項不為空則提交表單的實現方法就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持武林網。
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