function expand_section(section_name, hide_image, display_image)
{
    document.getElementById(hide_image).style.display = 'none';
    document.getElementById(display_image).style.display = '';
    document.getElementById(section_name).style.display = '';
}

function collapse_section(section_name, hide_image, display_image)
{
    document.getElementById(hide_image).style.display = 'none';
    document.getElementById(display_image).style.display = '';
    document.getElementById(section_name).style.display = 'none';
}

function display_review_section(review_order) 
{
    for (var i = 0; i < review_section_list.length; i++) {
        if (review_order == review_section_list[i]) {
            document.getElementById('Review_Section_' + review_section_list[i]).style.display = "";
        } else {
            document.getElementById('Review_Section_' + review_section_list[i]).style.display = "none";
        }
    }
}

function check_used_car_finder()
{
    errMessage = "";

    if(document.getElementById('HEADERddlMake').selectedIndex == 0) {
        errMessage += "Please select a make.\n";
    }
    if(document.getElementById('HEADERddlModel').selectedIndex == 0) {
        errMessage += "Please select a model.\n";
    }
    if (!IsZipcode(document.getElementById('HEADERcustomer_address_zip').value)) {
        errMessage += "Please enter a valid zip code.\n";
    }

    if(errMessage != "") {
        errMessage = "Please Fix the following Field(s):\n\n" + errMessage;
        alert(errMessage); 
        return false; 
    } 
    
    return true;
}

function checkDrilldownForm() {
    errMessage = "";

    if(document.getElementById('ddlMake').selectedIndex == 0)
        errMessage += "Please select a make.\n";

    if(document.getElementById('ddlModel').selectedIndex == 0)
        errMessage += "Please select a model.\n";

    if(document.getElementById("customer_address_zip").value == "" || document.getElementById("customer_address_zip").value == "Zip")
        errMessage += "Please enter a valid zip code.\n";

    if(errMessage != "") {
        errMessage = "Please Fix the follow Field(s):\n\n" + errMessage;
        alert(errMessage); 
        return false; 
    } 
    
    return true; 
}