function setButtonImage(dataContainer, imageName)
{
    if(dataContainer==null)
        return;
     
    if(dataContainer.src.indexOf("_2") != -1)
        dataContainer.src = dataContainer.src.replace(imageName + "_2", imageName);
    else
        dataContainer.src = dataContainer.src.replace(imageName, imageName + "_2");
}

function checkLength(dataContainer, length)
{   
  var text =dataContainer.value
  if(text.length>length)
    dataContainer.value = dataContainer.value.substring(0,length)  
}

function $(id)
{
    return document.getElementById(id);
}
 
function showPopup(url, w, h)
{
    window.open(url, '', 'width=' + w + ', height=' + h + ', scrollbars=yes, resizable=no');
}

function showPopup(url, w, h, scroll, resize)
{
    window.open(url, '', 'width=' + w + ', height=' + h + ', scrollbars=' + scroll + ', resizable=' + resize + '');
}