1. Jquery captures the enter key:

$("html").die().live("keydown",function(event){
if(event.keyCode==13){
//Here add the logic to be processed
}
});

//Bind the carriage return action
$('textarea[name=chattext]').keydown(function(event){
if(event.which==13){

}
});

2. Jquery gets multiple checked checkbox values:

$('input[type="checkbox"][name="types"]:checked').each(function() {
types = types+$(this).val()+ "|";
}
);

3. Jquery asynchronous request method:

$.ajax({
url : "${pageContext.request.contextPath}/UOSRoleManangerAction.do?method=createRole",
type : "post",
dataType : "html",
data:{"roleName":roleName,"roleDescription":roleDescription,"roles":roles,"types":types},
success : function(data){
var dataObj=eval("("+data+")");
if(dataObj.result){
alert(" Operation successful! ");
submitForm(null,"initPage");
}else {
alert(" Operation failed! ");
}
}
});