function clear_search_field(ctl){
 clear_fields(ctl, "Enter keyword(s)");
}
function clear_username_field(ctl){
 clear_fields(ctl, "Enter Username");
}
function clear_password_field(ctl){
 clear_fields(ctl, "Enter Password");
}
function clear_fields(ctl,InitialValue)
{
    if(FindById(ctl).value == InitialValue) FindById(ctl).value = "";
}
function FindById(ctl)
{
    return document.getElementById(ctl);
}