} function PrevMonth(mth) { if (mth == 0) return 11; if (mth == 1) return 0; else return (mth-1); } function NextMonth(mth) { if (mth == 11) return 0; else return (mth+1); } function PrevYearMonth(yrmth) { if ((yrmth % 100) == 1) return ((yrmth-100)+11); else return (yrmth-1); } function NextYearMonth(yrmth) { if ((yrmth % 100) == 12) return ((yrmth-11)+100); else return (yrmth+1); } function GetFullYear(d) { yr = d.getYear(); if (yr < 1000) { yr +=1900;} return yr; }