javascript 模仿回车键事件

<script>
	$(function(){
		var _login = function (){
			var _name = $(‘#name‘);
			var _password = $(‘#password‘);
            if(_name.val() == ‘‘ || _name.val() == ‘用户名‘){
                _name.focus();
                return false;
            }
            if(_password.val() == ‘‘ || _password.val() == ‘用户名‘){
                _password.focus();
                return false;
            }
            
            $.ajax({
            	type:‘POST‘,
            	data:$(‘.login form‘).serialize(),
            	url:‘register.php‘,
            	dataType:‘json‘,
            	success:function(data){
                    if(data.msg == 1){
                    	alert(‘注册成功‘);
                    	window.location.href=‘user.php‘;
                    }else if(data.msg ==2){
                    	alert(‘用户名已经存在！‘)
                    }else{
                    	alert(‘注册失败‘)
                    } 
            	}
            })
		}
        $(‘#submit‘).click(function(){
        	_login();
        })
	})
	document.onKeydown= function(event){
    	var e = event.keyCode?event.keyCode:event.which?event.which:event.charCode;
    	if(e == 13){
    		_login();
    	}
    }
</script>