字符串如:NotNull(document.getElementById('datalist_Report_ctl00_dr1_gvItem_ctl03_vtbMonthValue_Text_Month'))NotNull(document.getElementById('datalist_Report_ctl00_dr1_gvItem_ctl04_vtbMonthValue_Text_Month'))NotNull(document.getElementById('datalist_Report_ctl00_dr1_gvItem_ctl05_vtbMonthValue_Text_Month'))NotNull(document.getElementById('datalist_Report_ctl00_dr1_gvItem_ctl06_vtbMonthValue_Text_Month'))我想在每一个NotNull前面增加一个;  分号,第一个除外?怎么写?