Javascript IF ELSE ARRAY

Basically i have a script the creates the following 2 arrays. Both have bloque_id dynamically assigned. EG Bloque1 and Bloque2
for arguments sake the first array below has a bloque_id of Bloque1

window[bloque_id] = new Array();
window[bloque_id][1] = "bannanas";
window[bloque_id][2] = "oranges";

the second array below has a bloque_id of Bloque2
window[bloque_id] = new Array();
window[bloque_id][1] = "bannanas2";
window[bloque_id][2] = "oranges2";

First question is how do i make these arrays global and access them.
Second question how would i do check on their values ?  remembering that i want to access them in a different function globally if that makes sense
say also that the name of one of the arrays is stored in bloque_name as a value

if (window[bloque_name][1] == some value )
{
alert('match found');
}