(function($){$.fn.selectChain=function(options){var defaults={key:"id",value:"label"};var settings=$.extend({},defaults,options);if(!(settings.target instanceof $))settings.target=$(settings.target);return this.each(function(){var $$=$(this);$$.change(function(){var data=null;if(typeof settings.data=='string'){data=settings.data+'&'+this.name+'='+$$.val();}else if(typeof settings.data=='object'){data=settings.data;data[this.name]=$$.val();}
settings.target.empty();$.ajax({url:settings.url,data:data,type:(settings.type||'get'),dataType:'json',success:function(j){var options=[],i=0,o=null;for(i=0;i<j.length;i++){o=document.createElement("OPTION");o.value=typeof j[i]=='object'?j[i][settings.key]:j[i];o.text=typeof j[i]=='object'?j[i][settings.value]:j[i];settings.target.get(0).options[i]=o;}
setTimeout(function(){settings.target.find('option:first').attr('selected','selected').parent('select').trigger('change');},0);},error:function(xhr,desc,er){alert("an error occurred");}});});});};})(jQuery);