[Deff]

var click_count =[];
jQuery.fn.multiselect = function() {
 var List = this;
 $(this).parent().click(function(){
    var Num = List.index($(this));
    if(!click_count[Num])click_count[Num]=0;
     click_count[Num]++;
 });
}
$('.element').multiselect();