function showpostcode()
{
   var div = document.getElementById("ctl00_contents_divPostCode");
   var ckbox = document.getElementById("ctl00_contents_cbpostcode"); 
    if (ckbox.checked)
    {        
        div.style.display = 'block';
    } 
    else
    {
        div.style.display = 'none';
    }
} 

function showrssfeed()
{
   var ckbox = event.srcElement;
   var div = event.srcElement.parentElement.parentElement.childNodes[1];
    if (ckbox.checked)
    {        
        div.style.display = 'block';
    } 
    else
    {
        div.style.display = 'none';
    }
} 
function showdiv()
{
   var ckbox = event.srcElement;
   var div = event.srcElement.parentElement.parentElement.childNodes[3];
    if (ckbox.checked)
    {        
        div.style.display = 'block';
    } 
    else
    {
        div.style.display = 'none';
    }
}