if(global.mb_level == 0)
{
global.tselectid += 1;
if(global.tselectid > global.mb_ctopics-1-global.mbttopline)
{
global.tselectid = global.mb_ctopics-1-global.mbttopline;
}
if(global.mbttopline+global.mblheight < global.mb_ctopics && global.tselectid > global.mblheight-1)
{
global.tselectid = global.mblheight-1;
global.mbttopline += 1;
}
}


else if(global.mb_level == 1)
{

global.rselectid += 1;

if(global.rselectid > global.mb_topic[global.mb_ctopic,1]-(global.mb_topic[global.mb_ctopic,1]-global.mbrtopline)+1)
{
global.rselectid = global.mb_topic[global.mb_ctopic,1]-(global.mb_topic[global.mb_ctopic,1]-global.mbrtopline)+1;
}
if(global.mbrtopline-(global.mblheight-2) > 0 && global.rselectid > global.mblheight-1)
{
global.rselectid = global.mblheight-1;
global.mbrtopline -= 1;
}

}


else if((global.mb_level == 3 || global.mb_level == 4) && global.nselectid == 0)
{
global.lengthlimit = 700;
keyboard_string = global.mb_ntempbody;
global.nselectid = 1;
}