write random array value

can someone help me make this code work?

[code=php]
var rndArray = newArray(document.char.char00.value,
document.char.char01.value,
document.char.char02.value,
document.char.char03.value,
document.char.char04.value,
document.char.char05.value,
document.char.char06.value,
document.char.char07.value,
document.char.char08.value,
document.char.char09.value,
document.char.char10.value,
document.char.char11.value,
document.char.char12.value,
document.char.char13.value,
document.char.char14.value,
document.char.char15.value);

var rndNum = rnd(16)-1;
document.write(rndArray[rndNum.value]);

function rnd(){
rnd.today=new Date();
rnd.seed=rnd.today.getTime();
rnd.seed = (rnd.seed*9301+49297) % 233280;
return rnd.seed/(233280.0);}

function rand(number){return Math.ceil(rnd()*number);}
[/code]

I’m trying to display a random value from the array. It says “object expected” on the line the array is defined.

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