function pay(code,u) {
	location.replace('/teachmate_new/pay.php?code='+code+'&u='+u);
}
function down(u) {
	location.replace('/teachmate_new/download.php?u='+u);
	//location.replace('/teachmate_new/download.php?u="246"');
}

function keep(code,u) {
	location.replace('/teachmate_new/keep.php?code='+code+'&u='+u);
}
function keep_del(id,u) {
	location.replace('/teachmate_new/keep.php?id='+id+'&u='+u);
}