使用jQuery阻止UI

$('#send').click(function() {
       $.blockUI({ message: 
       '<p id="loading"><img src="images/busy.gif" /> processing...</p>'});  
        send();
       $(document).ajaxStop($.unblockUI); 
       setTimeout($.unblockUI, 2000); 

}); 

send()

ajaxStop

unblockUI

ajaxStop

$('#send').click(function() {
    $.blockUI({ message: '<p id="loading"><img src="images/busy.gif" /> processing...</p>'});  
    send();
    $(document).ajaxStop(function(){
        setTimeout($.unblockUI, 2000); 
    }); 
}); 

delay([time in seconds])

setTimeout