Remove accents (javascript)

I have this script below with the function toLowerCase();

I would like to add another function to the function toLowerCase();

What would be the line with the two functions together?

<script language="">

function kw_list ()

{

this.keywords = new Array ();

this.num_words = 0;

this.query = "";

this.original_query = "";

this.query_length = 0;

this.possible_points = 0;

this.multiple = points_title + points_keywords + points_description;

this.get_words = get_query;

this.no_query = no_query_found;

}


function get_query ()

{

this.query = top.location.search.substring (top.location.search.indexOf ('=') + 1);

while ((the_plus = (this.query.indexOf ("+", 0))) != -1)

{

this.query_length = this.query.length;

this.query = this.query.substring (0, the_plus) + " " + this.query.substring (the_plus + 1);

}

this.original_query = unescape (this.query);

this.query = this.original_query.toLowerCase ();

this.query_length = this.query.length;  

if (this.query != "")

{

var query_pointer = 0;

var end_word = 0;

var at_end = 0;

while ((this.num_words <= (max_keywords - 1)) && (! at_end))

{

end_word = this.query.indexOf (" ", query_pointer);

if (end_word == query_pointer)

query_pointer++;

else

{

if (end_word >= (this.query_length - 1))

at_end = 1;

if (end_word != -1)

this.keywords[this.num_words] = (this.query.substring (query_pointer, end_word)).toLowerCase ();

else

{

this.keywords[this.num_words] = this.query.substring (query_pointer, this.query_length);

at_end = 1;

}

this.num_words++;

if (query_pointer != -1)

query_pointer = end_word + 1;

if (query_pointer > (this.query_length - 1))

at_end = 1;

}

}

if (this.num_words == 0)

return (0);

else

{

this.possible_points = this.multiple * this.num_words;

return (1);

}

}

else

return (0);

}



function no_query_found ()

{

document.writeln ('<link rel="stylesheet" href="gp.css">');

document.writeln ('<CENTER><P>Pesquisa em branco.</P></CENTER>');

}

function entry (url, title, keywords, description)

{

this.url = url;

this.title = title;

this.keywords = keywords;

this.description = description;

this.points = 0;

this.search_entry = find_keyword;

this.print_entry = print_result;

}

function find_keyword (the_word)

{

var the_title = this.title.toLowerCase ();

var the_keywords = this.keywords.toLowerCase ();

var the_description = this.description.toLowerCase ();

if ((the_title.indexOf (the_word)) != -1)

this.points += points_title;

if ((the_keywords.indexOf (the_word)) != -1)

this.points += points_keywords;

if ((the_description.indexOf (the_word)) != -1)

this.points += points_description;

}



function print_result (possible_points)

{

document.writeln ('<CENTER><P><A HREF="' + this.url + '" target="meio">' + this.title + '</A>' + this.description + '</P></CENTER>');

}



function no_entry_printed (the_query)

{

document.writeln ('<link rel="stylesheet" href="gp.css">');

document.writeln ("<CENTER><P> Não há Ocorrências para <U><B>" + the_query + "</B></U>.</P></CENTER>"); 

}



function print_intro (the_query)

{

document.writeln ("<CENTER><P>Pesquisando por <U><B>" + the_query + "</B></U>:</P></CENTER>"); 

}

function begin_search ()

{

var key_list = new kw_list;

var entry_printed = 0;

if (! key_list.get_words ())

key_list.no_query ();

else

{

var counter = 0;

var counter2 = 0;

for (counter = 0; counter < entry_num; counter++)

for (counter2 = 0; counter2 <= (key_list.num_words - 1); counter2++)

the_entries[counter].search_entry (key_list.keywords[counter2]);

for (counter = key_list.possible_points; counter > 0; counter--)

{                                                                        

for (counter2 = 0; counter2 < entry_num; counter2++)

{

if (counter == the_entries[counter2].points)

{

if (entry_printed != 1)

{

entry_printed = 1;

print_intro (key_list.original_query);

}

the_entries[counter2].print_entry (key_list.possible_points);

}

}

}

if (! entry_printed)

no_entry_printed (key_list.original_query);

}

}

the_entries = new Array ();

The other function is this:

function retira_acentos(str) 
{

    com_acento = "ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐ
ÑÒÓÔÕÖØÙÚÛÜ
ÝŔÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿŕ";

sem_acento = "AAAAAAACEEEEIIIIDN
OOOOOOUUUUYRsBaaa
aaaaceeeeiiiionoooooouuuuybyr";
    novastr="";
    for(i=0; i<str.length; i++) {
        troca=false;
        for (a=0; a<com_acento.length; a++) {
            if (str.substr(i,1)==com_acento.substr(a,1)) {
                novastr+=sem_acento.substr(a,1);
                troca=true;
                break;
            }
        }
        if (troca==false) {
            novastr+=str.substr(i,1);
        }
    }
    return novastr;
}