function clear_field(field)
{
    if (field.value==field.defaultValue)
    {
        field.value=''
    }
}
// Checks field to see if any information was entered. If not, the default value is reentered.
function check_field(field)
{
    if (field.value=='' ||
    field.value==' ')
    {
        field.value=field.defaultValue
    }
}