function mt()
{
document.mt.src='img/titles/mt_54_1.gif';
document.mt.title='';
}

function st()
{
document.st.src='img/titles/st_54_1.gif';
document.st.title=' ';
}

function bg_call(num)
{
document.write('img/base/ba'+num+'_54_1.gif');
}