jQuery achieve the enter key login

When you log on, use a common login method when shortcuts, which

loginReq () method is the method of retrieval requests a login

	$("#login").click(function(){
		loginReq();
	});
	$(document).keydown(function(){
		if (event.keyCode == 13) {// ENTER keys 13 
			console.log(111);
			loginReq();;
		　}
	});
function loginReq () {// login request method
var aa = $ ( '. ww'). val ();
$.ajax({
  url:"",
  type:"post",
  data:{parm:userName,pwd:pwd},
  success:function(res){
      console.log(res);  
    }        
})

}