function postBanner(){
banner = new Array();
banner[0] = '
';
banner[1] = '
';
banner[2] = ' 
';
banner[3] = '
';
var randnom = Math.floor(Math.random()*banner.length);
document.write(banner[randnom]);
}
var lastbanner = -1;
function postBanner2(){
banner = new Array();
banner[0] = ' 
';
banner[1] = '
';
banner[2] = '
';
banner[3] = '
';
var randnom = -1;
do{
randnom = Math.floor(Math.random()*banner.length);
}
while(lastbanner == randnom);
lastbanner = randnom;
document.write(banner[randnom]);
}