function wop(url,wnd_name,width,height){w=window.open(url,wnd_name,'width='+width+',height='+height+',status=no,menubar=no,resizable=yes,scrollbars=yes,left='+String((screen.width-width)/2)+',top='+String((screen.height-height)/2));w.focus();return w;}

function checkForm(f)
{
        if (f['ElementName'].value == '') {
                alert('Ââåäèòå çàãîëîâîê');
                f['ElementName'].focus();
                return false;
        }
        if (f['message'].value == '') {
                alert('Ââåäèòå ñîîáùåíèå');
                f['message'].focus();
                return false;
        }
        return true;
}

function switchMes(id)
{
        var elem = document.getElementById('mes' + id);
        if (elem)
                elem.className = (elem.className == 'messhown')?'meshid':'messhown';
}

function checkAuth(f)
{
        if (f['login'].value == '') {
                alert('Ââåäèòå ëîãèí');
                f['login'].focus();
                return false;
        }
        if (f['pswd'].value == '') {
                alert('Ââåäèòå ïàðîëü');
                f['pswd'].focus();
                return false;
        }
        return true;
}

var Imgs = new Array();
function preLoad(srcs)
{
   if (!srcs) return false;
   if (srcs.length == 0) return false;
   for (var i in srcs) {
      var imgObj = new Image();
      imgObj.src = srcs[i];
      Imgs[i] = imgObj;
   }
}

function toggleBlock(id)
{
   var block = document.getElementById(id);
   if (!block) return false;
   var status = parseInt(block.getAttribute('shown'));
   if (isNaN(status)) status = 0;
   if (status == 1) {
      block.setAttribute('shown', 0);
      block.style.display = 'none';
   } else {
      block.setAttribute('shown', 1);
      block.style.display = 'block';
   }
}