Manually selecting a multiple drop down option if value is matched in JQuery

I need to manually select a dropdown option if a value is matched. Here is the code:

if($("#hiddenMyField").val() != "") {
            $("#dropdown").each(function(i){
                 $('option', this).each(function() {
                     if($(this).html() == $("#hiddenMyField").val()) {
                         // code to select the option
                     } else {
                         alert('not matched'开发者_如何转开发);
                     }

                 });

            });
        }

How can I select the current option located in the drop down if that if condition is met?

Thanks

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Options have a selected property:

this.selected = true;

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$(this).attr('selected', true);

should do the magic.

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All right I managed to find a workaround for this.

Since the options were being translated to divs with checkboxes with the ui.dropdownchecklist.js I first loaded the multiple dropdown with its normal view, then selected the necessary items with the this.selected = true and then I loaded the ui.dropdownchecklist.js function so the items will be translated back to divs with checkboxes. The user doesn't even see the actual multiple checkboxes so this worked out well for me. When they are translated to checkboxes, the selected items are kept and are also ticked when they are transferred.