function checkMandatory(){ var flag = true; var message = 'Please fill in all mandatory fields !'; if (document.checkFRM.field14.value.length==0){ flag = false; }; if (document.checkFRM.field15.value.length==0){ flag = false; }; if (document.checkFRM.field16.value.length==0){ flag = false; }; if (document.checkFRM.field18.value.length==0){ flag = false; }; if (flag == false) { alert(message); }; return flag; };