Divide and Round Up answer

I have two fields, field A and field B. Field A needs to be divided by Field B and the answer needs to be rounded up. Example: 2÷5=1

How can I code this?

var AA = this.getField(“UNITSWEEK”).value;

var BB = this.getField(“MAXDAYSWK”).value;

if (BB==0) event.value = "";

else event.value = Math.ceil (AA / BB);

}