function checkinfopage(page,classid)
{
  if (document.getElementById("page").value=="")
     {
       alert('Page num is error!');
       document.getElementById("page").focus();
       return true;
     }
     else
     {
        window.location=page+"?page="+document.getElementById("page").value+"&classid="+classid;
     }
}

function checkinfopage1(page,url)
{
  if (document.getElementById("page").value=="")
     {
       alert('Page num is error!');
       document.getElementById("page").focus();
       return true;
     }
     else
     {
        window.location=page+"?page="+document.getElementById("page").value+"&"+url;
     }
}

function search()
{
    if (document.getElementById("keyword").value=="" || document.getElementById("keyword").value=="keyword")
    {
        alert("Keyword is null!");
        return;
    }
    window.location="/search.aspx?keyword="+document.getElementById("keyword").value;
}