function check_all(frm, chAll){    comfList = document.forms[frm].elements['mid[]'];    checkAll = (chAll.checked)?true:false;    if (comfList.length) {        if (checkAll) {            for (i = 0; i < comfList.length; i++) {                comfList[i].checked = true;            }        }        else {            for (i = 0; i < comfList.length; i++) {                comfList[i].checked = false;            }        }    }    else {        /* This will take care of the situation when your checkbox/dropdown list (checkList[] element here) is dependent on            a condition and only a single check box came in a list.        */        if (checkAll) {            comfList.checked = true;        }        else {            comfList.checked = false;        }    }    return;} function submitIt(frmName){var comfList = document.forms[frmName].elements["mid[]"];    if (comfList.length) {        var selected = false;         for (var i=0; i < comfList.length; i++) {            if (comfList[i].checked) {                selected = true;                break;            }         }         if (! selected) {              alert('Please select a merchant.');              return false;         }         else {               document.forms[frmName].submit();               return true;         }    }    else {        if (comfList.checked) {            document.forms[frmName].submit();            return true;        }        else {            alert('Please select a merchant.');            return false;        }        }}