function reverce(d,e,dd)
{
    for (var i = 0; i < d; i++) 
    {
        var id="sc_"+i;
        document.getElementById(id).className=document.getElementById(id).className=='' ? 'second':'';
        if (document.getElementById(id).className=='') document.getElementById(id).style.display="none";
    }
    var sid="sc_"+e;
    if (document.getElementById(sid).className=='second') document.getElementById(sid).style.display="block";
    dd.className = dd.className == 'first' ? 'first_hover' : 'first';
};
function viewblock(d,dd)
{
    var id="sc_"+d;
    if (document.getElementById(id).className=='second') 
    {
        document.getElementById(id).style.display="block";
        if (dd.className=='first') dd.className = 'first_hover';
    }
}
function hideblock(d,dd)
{
    var id="sc_"+d;
    if (document.getElementById(id).className=='second') document.getElementById(id).style.display="none";
    dd.className='first';
}