onSubmit事件应用密码再次确认

 1 function check( )
 2 {
 3  var userName= document.myform.userName.value;
 4  var pass1= document.myform.pass1.value;
 5  var pass2=document.myform.pass2.value;
 6  if (pass1==pass2)
 7  {
 8      if (pass1.length!=0)
 9      {
10         document.write("<H2>恭喜您，注册成功！欢迎"+userName+"光临！</H2>");
11         return true;
12      }
13      else
14      {
15        alert("密码不能为空！\n请输入密码");
16        return false;
17      }
18  }
19  else
20  {
21        alert("确认码必须和输入的密码相同！");
22        return false;
23  }
24 }
25 </SCRIPT>

<FORM action="" method="post" name="myform" onSubmit="return check( )"  >

.....

</form>