<script runat="server">
    Platform.Load("Core", "1.1.1");

var rr = Platform.Function.CreateObject("RetrieveRequest");
        Platform.Function.SetObjectProperty(rr, "ObjectType", "EmailSendDefinition");
        Platform.Function.AddObjectArrayItem(rr, "Properties", "CustomerKey");
        Platform.Function.AddObjectArrayItem(rr, "Properties", "Name");
        Platform.Function.AddObjectArrayItem(rr, "Properties", "EmailSubject")
        Platform.Function.AddObjectArrayItem(rr, "Properties", "SendDefinitionList");
        Platform.Function.AddObjectArrayItem(rr, "Properties", "DeliveryProfile.CustomerKey");
        Platform.Function.AddObjectArrayItem(rr, "Properties", "SenderProfile.CustomerKey");;
        Platform.Function.AddObjectArrayItem(rr, "Properties", "IsMultipart");
        Platform.Function.AddObjectArrayItem(rr, "Properties", "CategoryID");
        Platform.Function.AddObjectArrayItem(rr, "Properties", "CreatedDate");
        Platform.Function.AddObjectArrayItem(rr, "Properties", "ModifiedDate");

//"From" date
        var sfp1 = Platform.Function.CreateObject("SimpleFilterPart");
        Platform.Function.SetObjectProperty(sfp1, "Property", "ModifiedDate");
        Platform.Function.SetObjectProperty(sfp1, "SimpleOperator", "greaterThanOrEqual");
        Platform.Function.AddObjectArrayItem(sfp1, "Value", "2015-08-27T00:00:00.000");

        //"To" date
        var sfp2 = Platform.Function.CreateObject("SimpleFilterPart");
        Platform.Function.SetObjectProperty(sfp2, "Property", "ModifiedDate");
        Platform.Function.SetObjectProperty(sfp2, "SimpleOperator", "lessThanOrEqual");
        Platform.Function.AddObjectArrayItem(sfp2, "Value", "2015-08-28T00:00:00.000");


        //Adding two Simple filters together to create a Complex filter
        var cfp = Platform.Function.CreateObject("ComplexFilterPart");
        Platform.Function.SetObjectProperty(cfp, "LeftOperand", sfp1);
        Platform.Function.SetObjectProperty(cfp, "LogicalOperator", "AND");
        Platform.Function.SetObjectProperty(cfp, "RightOperand", sfp2);

        //Add the Complex filter to the RetrieveRequest
        Platform.Function.SetObjectProperty(rr, "Filter", cfp);

var retrieveStatus = [0, 0, 0];
        var retrieveResult = Platform.Function.InvokeRetrieve(rr, retrieveStatus);

        Write(Stringify(retrieveResult));

</script>