Jquery monitor button press the enter key to trigger the implementation code of a method

<script type="text/javascript">
$(function () { 
$('input:text:first').focus(); //Focus on the first text box
var $inp = $('input'); //All the input elements
$inp.keypress(function (e) { //I'm going to call the event parameter of function, e, event, whatever, e is the event that happens in the IE window.
    var key = e.which; //E.w.hich is the value of the key
    if (key == 13) {
        alert("aaa");
    }
}); 
});

A strange phenomenon:

I dragged a Login control and converted it to a template for custom development.

< img border = 0 SRC = "/ / files.jb51.net/file_images/article/201405/20140511111529.png" >

The return button in the text bar is captured in the above code, and you need to trigger the LoginButton to submit the login information for verification, but you use $("[id$=LoginButton]").click(); Only available in firefox, not in IE, try $("[id$=LoginButton]"). Focus (); , effective in ie, on ie focus() that is to complete the focus and execute the click, why?

$inp.keypress(function (event) {
    var key = event.which;
    if (key == 13) {
        $("[id$=LoginButton]").click(); //Support firefox,IE martial arts school
        //$('input:last').focus();
        $("[id$=LoginButton]").focus();  //Support for IE, firefox not valid.
//Both IE and firefox are supported
    }
});

Jquery USES the keyboard to listen for events (SSH)

$(document).ready(function(){
  find();
$("#pageSize").bind("keyup",function(){find();});
    //Set the keyboard monitor event which is when you enter a value in the textbox and then immediately execute the corresponding method and what I'm showing you here is that when you type 4 and so on in the textbox it will display 4 pieces of data on the page
    ( "#pageSize : this is to get the label property id The value of the) 
    ("keyup":  Keyboard monitor event   The values are fixed   Can't be changed )
    (at the back of the function(){find();} : is the method to be executed.) 
$("#pageNo").bind("keyup",function(){find();});
   //Set the keyboard monitor event which is when you enter a value in the textbox you immediately execute the corresponding method and what I'm showing you here is that when you type 5 and so on in the textbox it will display the fifth page on the page
   alert(" find()");
 Same as above 
   });