var a=0;
var b = 2000;
var prouzek = "<object border='0' width='500' height='70'><param name='movie' value='doc/banner" + a + ".swf'><embed src='doc/banner" + a + ".swf' width='500' height='70'></object>";

function haha()
{
var a = Math.floor(Math.random()*0);
prouzek = "<object border='0' width='500' height='70'><param name='movie' value='doc/banner" + a + ".swf'><embed src='doc/banner" + a + ".swf' width='500' height='70'></object>";
return prouzek;
}


function ukaz()
{
document.getElementById('tunak').innerHTML=haha();
}