erpnext override event listener

 if(cur_frm && cur_frm.doctype===doctype && cur_frm.events[fieldname]) {
 	delete cur_frm.events[fieldname];
 }

 // for debuging 
 console.log(doctype, fieldname, cur_frm);

 if(cur_frm && cur_frm.cscript && cur_frm.cscript[fieldname]) {
 	delete cur_frm.cscript[fieldname];
 }