[Javascript] strange things in javascript world

[Iztok Polanic]

 Hi!
 
 Some strange things are going on in javascript world...... :(
 I have this function:
 
 function vnos(id) {
  for (var j = 1; j == stPoglavij; j++) {
 
   var temp1 = 'arrayPoglavja'+j;
    temp1 = eval(temp1);
 
   temp1 = temp1[0].indexOf(id,1);
 
   if (temp1 != '-1') {
   document.forms["Forma"].elements["poglavje"+id].value = 'on';
   }
 }
 }
 
 And javascript wont and wont go into this for loop. WHY THE HELL NOT? :(
 One more thing....what is the correct expression to turn on the checkbox
 (bellow)?
 
 document.forms["Forma"].elements["poglavje"].value = 'on'
 
 Please help me!
 
 Bye,
 
 Iztok