scList = new Array();


function cnSetCat(c) {
var ref = document.catnav.sc;
ref.options[0].selected = true
for (i=ref.options.length-1;i>0;i--) {
	ref.options[i] = null
	}
ocount=1;
for (i=0;i<scList.length;i++) {
	if (scList[i][1] == c) {
		ref.options[ocount] = new Option(scList[i][2],scList[i][0]);
		ocount++;
		}
	}

}