function submitForm()
{
    val = "";
    for (i=0 ; i<document.getElementsByName("radioproduct").length; i++) {
        if (document.getElementsByName("radioproduct")[i].checked) {
            val = document.getElementsByName("radioproduct")[i].value;
        }
    }
 
    if(val != "") {
        if(val == 1) {
            window.location.href='product_range_strepsils_original.php';
        }
        else if(val == 2)
        {
            window.location.href='product_range_strepsils_sugar_free.php';
        }
        else if(val == 3)
        {
            window.location.href='product_range_strepsils_extra.php';
        }
        else if(val == 4)
        {
            window.location.href='product_range_strepsils_strefen.php';
        }
        else if(val == 5)
        {
            window.location.href='product_range_strepsils_sore_throat_and_blocked_nose.php';
        }   
        else if(val == 6)
        {
            window.location.href='product_range_strepsils_cool.php';
        }              
        else
        {
            window.location.href='product_range_strepsils_handy_tube.php';
        }              
    }
    else {
        alert("Please select one of the options.");
    }
}