JS監(jiān)聽某個輸入框

//回車事件綁定
    $('#search_input').bind('keyup', function(event) {
        if (event.keyCode == "13") {
            //回車執(zhí)行查詢
            $('#search_button').click();
        }
    });

S監(jiān)聽某個DIV區(qū)域

$("#queryTable").bind("keydown",function(e){
        // 兼容FF和IE和Opera    
    var theEvent = e || window.event;    
    var code = theEvent.keyCode || theEvent.which || theEvent.charCode;    
    if (code == 13) {    
        //回車執(zhí)行查詢
            $("#queryButton").click();
        }    
});

JS監(jiān)聽body區(qū)域

//回車事件
    document.onkeydown = function (event) {
        var e = event || window.event;
        if (e && e.keyCode == 13) { //回車鍵的鍵值為13
            $("#login").click(); //調(diào)用登錄按鈕的登錄事件
        }
    };