function GetSmlouva(id, smlouva) 
  {
    //forma postback  
    if (document.getElementById(id) != null) 
    {
        document.getElementById(id).value = smlouva;
        __doPostBack('ChangeSmlouva', smlouva);
    }
  }

function onkeypressNext(e, o) {
    if (window.event) // IE
    {
        keynum = e.keyCode;
        //    event.returnValue = false;
        //    event.cancel = true;     
    }
    else if (e.which) // Netscape/Firefox/Opera
    {
        keynum = e.which;
    }
    if (keynum == 13) {
        if (document.getElementById(o) != null) {
            if (document.getElementById(o).focus != null) {
                document.getElementById(o).focus();
            }
        }
    }
    if ((event.which == 13) || (event.keyCode == 13)) {
        event.returnValue = false;
        event.cancel = true;
    }
}

// Doplní řetězec do __EVENTTARGET
function onclickPostback(s)
{
 if (document.getElementById("__EVENTTARGET")!=null)
  {
   document.getElementById("__EVENTTARGET").value=s;
  }
}