$('#foo').bind('click', function()
{
 alert($(this).text());
});
$('#foo').trigger('click');
$('#foo').bind('custom', function(event, param1, param2)
{
 alert(param1 + "\n" + param2);
});
$('#foo').trigger('custom', ['Custom', 'Event']);

var $search=$('#header .search');
$search.find('li').hover(function()
{
 alert(1);
},function()
{
 alert(2);
});
$search.find('li').eq(0).trigger('hover');

var $search=$('#header .search');
$search.find('li').click(function()
{
 alert(1);
},function()
{
 alert(2);
});
$search.find('li').eq(0).trigger('click');

var $search=$('#header .search');
$search.find('li').hover(function()
{
 alert(1);
},function()
{
 alert(2);
});
$search.find('li').eq(0).trigger('mouseenter');//hover修改为mouseenter/mouseleave/mouseover/mouseout