function next(x)
{
var prev=x-1;
document.getElementById('page_'+x).style.display='block';
document.getElementById('page_'+prev).style.display='none';
}

function previous(x)
{
var prev=x-1;
document.getElementById('page_'+x).style.display='none';
document.getElementById('page_'+prev).style.display='block';
}
//После добавления видео в раздел "ВИДЕО" 'внизу справа' 
//нужно добавить строки для новых видеоролив в эту функцию 
function open_int(x,y)
{	
changeTitle(x-1);
var elem_out = document.getElementById('inter_1');
elem_out.style.display='none';
var elem_out1 = document.getElementById('inter_2');
elem_out1.style.display='none';
var elem_out2 = document.getElementById('inter_3');
elem_out2.style.display='none';
var elem_out3 = document.getElementById('inter_4');
elem_out3.style.display='none';
var elem_out4 = document.getElementById('inter_5');
elem_out4.style.display='none';
var elem_out5 = document.getElementById('inter_6');
elem_out5.style.display='none';
var elem_out6 = document.getElementById('inter_7');
elem_out6.style.display='none';
var elem_out7 = document.getElementById('inter_8');
elem_out7.style.display='none';
var elem_out8 = document.getElementById('inter_9');
elem_out8.style.display='none';
var elem_out9 = document.getElementById('inter_10');
elem_out9.style.display='none';

//comment 2011-02-15
//var elem_out10 = document.getElementById('inter_'+x);
//elem_out10.style.display='block';
//end comment 2011-02-15

//new 2011-02-15
var elem_out9 = document.getElementById('inter_10');
elem_out9.style.display='none';
var elem_out10 = document.getElementById('inter_11');
elem_out10.style.display='none';
var elem_out11 = document.getElementById('inter_'+x);
elem_out11.style.display='block';
//end new 2011-02-15
}

function open_resp(x,y)
{
for (i=0; i < y; ++i)
document.getElementById('resp_'+(i+1)).style.display='none';
document.getElementById('resp_'+x).style.display='block';
}