Drop-down check box

$(' #beerId ').ComboBox({
 Url:'/index.php/admin/beer/getbeer ',
 Valuefield:' ID ',
 TextField:' Text ',
 Panelheight:' Auto ',
 Multiple: True,
 Formatter: function(Row) {
 VarOPTs=$(This).ComboBox(' Options ');
 Return' <input type= ' checkbox ' class= ' Combobox-checkbox > '+Row[OPTs.TextField]
},
 Onloadsuccess: function() {
 VarOPTs=$(This).ComboBox(' Options ');
 VarTarget= This;
 VarValues=$(Target).ComboBox(' GetValues ');
 $.Map(Values,function(Value) {
 VarEl=OPTs.Finder.Getel(Target,Value);
 El.Find(' Input.combobox-checkbox ')._propattr(' Checked ',True);
})
},
 OnSelect: function(Row) {
 Console.log (row);
 VarOPTs=$(This).ComboBox(' Options ');
 VarEl=OPTs.Finder.Getel(This,Row[OPTs.Valuefield]);
 El.Find(' Input.combobox-checkbox ')._propattr ( ' checked ' , true); 
 }, 
  onunselect< Span style= "COLOR: #ff9d00" >: function  (row" {
  var opts = $ this).  

Drop-down check box