I am having problems with the following JavaScript code included in my page http://qwerty-2009.angelfire.com/js-prime.html .

<SCRIPT>

a=new Array;ttt=new Array;

a[0]="Algorithm ... ";ttt[0]=0;

......

a[3]="or ... ";ttt[3]=2;

for(j=0;j<=3;j++){

c=a[j];

document.write(tab(ttt[j]));document.write(c);

document.write("<br>");}

</SCRIPT>

Here tab(n) is a string valued function defined in the head which gives a number of blank spaces.

I find that the first element of the array a is output correctly, but on subsequent passes of the "for" loop the value output is "undefined". No matter what i change the lower limit of the "for" loop to within the range 0..3, the first value is correctly written while the rest are given as "undefined".