function get_element_by_id(element_id)
{
    if(document.getElementById)//Mozilla
    {
        return document.getElementById(element_id)
    }
    else//IE
    {
        document.all[element_id];
    }
}

function get_elements_by_name(element_name)
{
    if(document.getElementsByName)//Mozilla
    {
        return document.getElementsByName(element_name);
    }
    else//IE
    {
        return document.all[element_name];
    }
}