I have app. This app has its own css and when I deploy it to salesforce my app has conflict with salesforce css, so my app and salesforce design look awful.

How can I make some kind of css namespace for my app to remove conflict with salesforce ?

How can make ajax request using jQuery in VisulForce to Apex ?

Example

 $.ajax({

type :"POST",
url :'Apex-url',
dataType :"json",
success:function(data){
alert( data );
},
error :function(){
alert("Sorry, The requested property could not be found.");
}
});

Can I make ajax file uploader without page refreshing something like this ?

http://www.phpletter.com/Demo/AjaxFileUpload-Demo/

I have a big project in Force.com IDE and I have very many classes, can I make in folder src/classes another sub folders and make project more cleaner ?

Can I hide xml files that makes for every class in Force.com IDE ?

How can make ajax request using jQuery in VisulForce to Apex ?

Example

 $.ajax({

type :"POST",
url :'Apex-url',
dataType :"json",
success:function(data){
alert( data );
},
error :function(){
alert("Sorry, The requested property could not be found.");
}
});

How can make ajax request using jQuery in VisulForce to Apex ?

Example

 $.ajax({

type :"POST",
url :'Apex-url',
dataType :"json",
success:function(data){
alert( data );
},
error :function(){
alert("Sorry, The requested property could not be found.");
}
});

Can I make ajax file uploader without page refreshing something like this ?

http://www.phpletter.com/Demo/AjaxFileUpload-Demo/

I have a big project in Force.com IDE and I have very many classes, can I make in folder src/classes another sub folders and make project more cleaner ?

Can I hide xml files that makes for every class in Force.com IDE ?