form的两种提交方式

有两种方法，一种是用submit提交。一种是用button提交。
方法一：

js方法：
function tijiao(){
   var result = document.getElementById("userid").value;
   var password = document.getElementById("userpassid").value;
   if(result == ""  ){
     alert("用户名不能为空");
     return false;
   }
   if(password == ""  ){
    alert("密码不能为空");
     return false;
   }else{
   return true;
   }
}

在form表单里写成这样：

<form id="formid"  name= "myform" method = 'post'  action = 'wechat/matter/saveVideo.do' onsubmit = "return tijiao();" >

            <table width="100%" border="0">

              <tr>

                <td width="60" height="40" align="right">用户名 </td>

                <td><input type="text" value="" class="text2" name = "username" id = "userid"/></td>

              </tr>

              <tr>

                <td width="60" height="40" align="right">密  码 </td>

                <td><input type="password" value="" class="text2" name = "userpass" id = "userpassid"/></td>

              </tr>

              <tr>

                <td width="60" height="40" align="right"> </td>

                <td><div class="c4">

                 <input type="submit" value="" class="btn2"  />

</div>

</tr>
 

方法二：
function tijiao(){
   var result = document.getElementById("userid").value;
   var password = document.getElementById("passid").value;

   if(result == ""  ){
     alert("用户名不能为空");
     return false;
   }
   if(password == ""  ){
    alert("密码不能为空");
     return false;
   }
  document.getElementById("formid").submit();
}

form表格的写法，需要写id
 <form id="formid" method = 'post'  action = 'wechat/matter/saveVideo.do'  >

button按钮的写法如下：

<input type="button" value="" class="btn2" onclick = "tijiao();" />