Javascript and PHP arrays

Hi, I'd like to know how can I access to an array's element in javascript. I'd better explain it with an example, here it comes: <SCRIPT> alert(document.form.foo[0].value); // That seems not to be alert(document.form.bar[0][1].value); // correct, so how do // I do it? </SCRIPT> <FORM NAME=form> <INPUT TYPE=TEXT NAME=foo[0] VALUE=0> <INPUT TYPE=TEXT NAME=foo[1] VALUE=1> <INPUT TYPE=TEXT NAME=foo[2] VALUE=2> <INPUT TYPE=TEXT NAME=foo[4] VALUE=4> <INPUT TYPE=TEXT NAME=foo[3] VALUE=3> <INPUT TYPE=TEXT NAME=bar[0][0] VALUE=0> <INPUT TYPE=TEXT NAME=bar[0][1] VALUE=1> <INPUT TYPE=TEXT NAME=bar[1][0] VALUE=2> <INPUT TYPE=TEXT NAME=bar[1][1] VALUE=3> </FORM>