prototype 的ajax

初步使用，有些情况，比jquery 好使

var updater;

 

function changeUser(newUser, newName) {

$('currentChat').value = "";

targetName = newName;

targetUser = newUser;

 

$('nameTag').innerHTML = targetName;

 

updater.stop();

updater = new Ajax.PeriodicalUpdater('currentChat', 'ChatServlet', {

method : 'get',

insertion : Insertion.Bottom,

frequency : pl,

parameters : {

getMessages : targetUser

}

});

 

}

 

function populateForm() {

 

new Ajax.Request('ChatServlet', {

 method: 'get',

 asynchronous: false,

 parameters: {

initConn: 'initConn',

targetUser:targetUser,

userName:userName,

password:password

}

  });

 

new Ajax.Updater('roster', 'ChatServlet', {

method : 'get',

parameters : {

getRoster : 'yes',

userName:userName,

password:password

}

});

 

updater = new Ajax.PeriodicalUpdater('currentChat', 'ChatServlet', {

method : 'get',

insertion : Insertion.Bottom,

frequency : pl,

parameters : {

getMessages : targetUser,

userName:userName,

password:password

},

onSuccess:function(data,hd){

setTimeout(function(){

var obj = document.getElementById("currentChat");

obj.scrollTop= obj.scrollHeight;

},200);

}

});

 

$('nameTag').innerHTML = targetName;

 

}

 

function sendMessage() {

 

new Ajax.Request('ChatServlet', {

method : 'get',

parameters : {

target : targetUser,

message : $('newChatText').getValue(),

userName:userName,

password:password

}

});

 

$('newChatText').value = "";

 

}

 

function strdown(event) {

if (event.keyCode == 13) {

//event.keyCode=0;   //取消回车

document.getElementById("newChatButton").click();

return false;

}

}