杂七杂八

<td rowspan="2"> 合并两列

<form name="myform" method="post" action="chkregister.jsp" OnSubmit="return checkdata();">


function checkdata()
{
       username=document.myform.username.value;
       password1=document.myform.password1.value;
       password2=document.myform.password2.value;
       age=document.myform.age.value;
       email=document.myform.email.value;
       phone=document.myform.phone.value;
       address=document.myform.address.value;
       
if(username.length<1||username.length>20)
{
alert("用户名长度必须在1位到20位之间");
return false;
}
if(password1.length<6||password1.length>10)
{
alert("密码长度必须在6位到10位之间");
return false;
}
if(password1!=password2)
{
alert("密码不匹配");
return false;
}
if(email==""||(email.indexOf('@')==-1)||(email.indexOf('.')==-1))
        {
            alert("电子邮件填写不正确");
return false;
        }
if(age==""||isNaN(age)||parseInt(age)<0||parseInt(age)>99)
{
        alert("年龄不合要求");
        return false;
}    
        if(phone==""||isNaN(phone)||parseInt(phone)<0)
{
        alert("电话号码不合规范");
        return false;
}    
if(address=="")
{
        alert("地址不能为空");
        return false;
}    
return true;
}

   <select name="face" size=1 onChange="document.images['face'].src=options[selectedIndex].value;">
              <%
                 for (int i=1;i<=60;i++) 
                   out.println("<option value=images/face/Image" + i + ".gif>Image"+ i +"</option>");
              %>
              </select>
日期格式化
java.text.DateFormat df =  java.text.DateFormat.getDateInstance(DateFormat.MEDIUM, request.getLocale());
df.format(new java.util.Date())