var pMax=12;
var pAt=pMax;
function p_u(x) {
	pAt++;
	if (pAt==13){pAt=1}
	for (var i = 1; i <= pMax;i++) {
		if(i == x) {
			MM_changeProp('pro'+i,'','style.backgroundColor','#656565','DIV');
		}
		else {
			MM_changeProp('pro'+i,'','style.backgroundColor','','DIV');
		}
	}
}
// p_u(1);