function add1Month(l_tancd) {
   document.li50_01.TargetMode.value = "1";
   document.li50_01.action = "./li50_01.asp?TANCD="+ l_tancd;
   document.li50_01.target = "_self";
   document.li50_01.submit();
}


function sub1Month(l_tancd) {
   document.li50_01.TargetMode.value = "-1";
   document.li50_01.action = "./li50_01.asp?TANCD="+ l_tancd;
   document.li50_01.target = "_self";
   document.li50_01.submit();
}


function today(l_tancd) {
   document.li50_01.TargetMode.value = "0";
   document.li50_01.action = "./li50_01.asp?TANCD="+ l_tancd;
   document.li50_01.target = "_self";
   document.li50_01.submit();
}