function checkUncheckAll(theForm, check) {
     var z = 0;
	 for(z=0; z<theForm.length;z++){
		  if(theForm[z].type == 'checkbox'){
			  theForm[z].checked = check;
		  }
	 }
}

$(document).ready (
    function () {
       $('.petcheck').shiftcheckbox();
    }
);