Copying A Table To An Array?

Hello everyone I was just try to copy the contents of a table and put it in a multidimentional array! But for some reason it keeps rewritting over each time only returning one row! I just cant figure out what I am doing wrong its probly simple! Any help would be great!

Code:
var tabular=new Array();
function copyTable(){
obj=document.getElementById("theTab");
for(i=0,j=0;i<obj.rows.length,j<obj.rows(i).cells.length;i++,j++){
tabular[i]=new Array();
tabular[i].push(obj.rows(i).cells(j).innerText);
}
alert(tabular);
}