var len = document.forms[0].chk.length;
     for(var i=0;i<len;i++){
    if(document.forms[0].chk[i].checked){
     alert(document.forms[0].requestNum[i].value+"qwe");
    }
     }

chk為複選框name值，requestNum為列的name值

獲取複選框值

function chk(){
 if(document.forms[0].chk==null){
   return;
    }
    var chkId = '';
    var len = document.forms[0].chk.length;
 if(len>1){
     var tag = 0;
  for(var i=0;i<len;i++){
   if(document.forms[0].chk[i].checked){  
       if (tag==0) {
        chkId = chkId + document.forms[0].chk[i].value;
        tag = 1;
       } else {
        chkId = chkId + ","+document.forms[0].chk[i].value;
       }          
         
   }
  }
 } else {
  if(document.forms[0].chk.checked){
   chkId = document.forms[0].chk.value;
   }
 }
 if (chkId=='') {
     return;
 }
 return chkId;
}