function doZoom(size)
{
document.getElementById('zoom').style.fontSize=size+'px';
}
function ckremarkform()//评论验证
{
if(document.getElementById("niming").checked==true)
   {
   }
   else
   {
     if(document.getElementById("username").value=="")
     {
          alert("用户名不能为空！");
          return false;
     }
     if(document.getElementById("password").value=="")
     {
          alert("密码不能为空�?);
          return false;
     }
     niming = "0";
   }
if (document.getElementById("content").value==""){alert("评论内容不能为空�?);document.getElementById("content").focus();return false;}

return true;
}
function checkChange(obj)//显示隐藏
{
document.getElementById('newslogin').style.display = obj.checked?'inline':'none';
}
function checkChange1(obj)//显示隐藏
{
document.getElementById('newslogin').style.display = obj.checked?'none':'inline';