var rows = 20;
var cat = new Array()
var id = new Array()
var desc = new Array()
function genRandom(num){var no=""; no+=(Math.random()*num)+10; r=parseInt(no); return r;}
function stcat (nr) { 
	out = '<b>'+cat[nr-1].replace("_"," ")+'</b><br>';
    for(var p = 0; p < (rows); p++) {out=out + genRandom(15) +' <a href="st.php?c=' + id[(nr-1)] + '">' + desc[(nr-1)] + '</a><br>'; }
    document.write(out);
}