How to apply if else condtion in jquery script with selected value from dropdown?

I am working on one form. Applying some java script validations on form. I want one changes with my validations. I have one dropdown this some company names. suppose i have five companies .

<select id="org_id">
    <option value="1">ABC</option>
    <option value="2">DEF</option>
    <option value="3">GHI</option>
    <option value="4">IJK</option>
    <option value="5">LMN</option>
</select> 

if i want to not validate form if user select ABC and if user will select any other then only validation should be apply on form.

My validation script:

var frmvalidator = new Validator("add_employee_frm");
    frmvalidator.addValidation("employee_number","req","Please Enter Employee Number");
    frmvalidator.addValidation("employee_name","req","Please Enter Employee Name");
    frmvalidator.addValidation("employee_name","alphabetic_space","Please Enter Valid Employee Name"); 

I did try with if else condition on my validation script. but its not working.

$(function () {
    $("#org_id").change(function () {                   
        var selectedValue = $(this).val();
        alert(selectedValue);
    });
});
    if(selectedValue == 1)
    {
        return true;
    }
    elseif(selectedValue != 1)
    {
        var frmvalidator = new Validator("add_employee_frm");
        frmvalidator.addValidation("employee_number","req","Please Enter Employee Number");
        frmvalidator.addValidation("employee_name","req","Please Enter Employee Name");
        frmvalidator.addValidation("employee_name","alphabetic_space","Please Enter Valid Employee Name");
        return true;
    }

this code is not working for me. i am getting value from selected value and pushing it into if..else condition. how to achieve this .