ECMA Script for LoadListData

var clientContext = null;
var web = null;
ExecuteOrDelayUntilScriptLoaded(Initialize, "sp.js");
function Initialize()
{
clientContext = new SP.ClientContext.get_current();
web = clientContext.get_web();
this.list = web.get_lists().getByTitle("Images");
clientContext.load(list, 'Title', 'Id');
clientContext.executeQueryAsync(Function.createDelegate(this, this.onListLoadSuccess),
Function.createDelegate(this, this.onQueryFailed));
}
function onListLoadSuccess(sender, args) {
alert("List title : " + this.list.get_title() + "; List ID : "+ this.list.get_id());
}

function onQueryFailed(sender, args) {
alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
}