function checkbox_activ(div_id, div_id2, nr_iteratii, id_activ)
{

     for (counter = 0; counter <= nr_iteratii; counter++)
     {
     	if(document.getElementById(div_id+counter) != undefined) {
        	document.getElementById(div_id+counter).style.display = 'none';
           

        }

        if(document.getElementById(div_id2+counter) != undefined) {
        	document.getElementById(div_id2+counter).style.display = 'none';

        }

     }

     //alert(div_id+id_activ)
     document.getElementById(div_id+id_activ).style.display = '';

}