function checkSelected()
    {
       
        var incr = 0;
        var theElement;
        var element_type;        
        if(document.forms["productChoice"])
        {
        var num_of_elements = document.forms["productChoice"].elements.length;       
        for (i = 0; i < num_of_elements; i++) 
        {
            theElement = document.forms["productChoice"].elements[i];
            element_type = theElement.type;  
            if (element_type == "radio" ) 
            {   
                var id = "productRow" + incr;
                if (theElement.checked == true) 
                {   
                    document.getElementById(id).className = "highlight"; 
                }
                else
                {
                    document.getElementById(id).className = ""; 
                }
                incr = Number(incr) + 1;
            }
        }
        }
    }