function GetIServerVar(clientID)
{
    return $get($get("hdIModuleID").value + "_" + clientID);
}

function SwapImg(img)
{
    var def = GetIServerVar('imgDefault');

    var tmpSrc = def.src.replace('type-main', 'type-small'); ;
    var tmpAlt = def.alt;
    
    def.src = img.src.replace('type-small','type-main');
    def.alt = def.title = img.alt;
    
    img.src = tmpSrc;
    img.alt = img.title = tmpAlt;
}