how to remove courses store in ids in edit post controller

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** edit http post i need to remove courses stored in ids variable

note i need remove courses selected not edit**

in jquery i store values of removed courses in ids variable

suppose i removed photoshop and flash it will store value of 3,4 in ids

variable

below code when click remove it save values of courses removed in

variable ids as array

$("#tb").on("click", ".r", function () {  
$(this).parent().parent().hide();  
$(this).parent().prev().prev().find("input").addClass("remove");  
var ids = [];  
var i = 0;  
$(".remove").each(function () {  
ids[i] = $(this).val();  
i++;  
});  
for (var k = 0; k < ids.length; k++) {  
alert(ids[k]);  
}  
});  

i show courses per employee from table EmployeeCourse in edit get as following

var index = 0;  
$.ajax({  
url: "/Employeedata/getcoursesbyempid",  
data:{x:$("#hid").val()},  
success: function (res) {  
$.each(res, function (i, e) {  
$("#tb").append("<tr><td><input type = 'hidden' name='empcourses[" + index + "].CourseId' value='" + e.Id + "'/></td><td>" + e.CourseName + "</td><td><input type='button' value='remove' class='r'/></td></tr>")  
index++;  
});  
}  
})  
public JsonResult getcoursesbyempid(int x)  
{  
db.Configuration.ProxyCreationEnabled = false;  
var data = db.EmployeeCourses.Where(a => a.EmployeeId == x).Join(db.Courses, a => a.CourseId, b => b.Id, (a, b) => new { Id = a.CourseId, CourseName = b.CourseName });  
return Json(data, JsonRequestBehavior.AllowGet);  
}  

my model using as following

public class Cusomemp2  
{  
    public int Id { get; set; }  
    public string Name { get; set; }  
    public List<EmployeeCourse> empcourses { get; set; }  
}  

when remove courses in edit HTTPPOST what i write here

[HttpPost]  
public ActionResult Edit(Cusomemp2 custom)  
{  
//what i write to remove courses saved in ids from table EmployeeCourse  
return View();  
}  

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see image above for details