I think I have not got the syntax correct for writing a javascript function and calling it to assign its return value to a variable.

My function is:

getObjName(objId){
  var objName ="";
$.ajax( {
    type : "GET",
    url : "Object",
    dataType: 'json',
    data : "objId="+objId,
    success : function(data) {
    objName = data;
    }
});
  return objName;
}

I am trying to call it and assign it to a variable with:

var objName = getObjName(objId);

However Eclipse is telling me that "there is no such function getObjName() defined"