问题
I downloaded the code given in http://www.sencha.com/forum/showthread.php?134751-Ext.ux.form.field.BoxSelect-Intuitive-Multi-Select-ComboBox but its not working properly as I try to enter another item by typing. As it gives me error shown below.
ext.fly(node) is null..
Plzz help me into this
来源：https://stackoverflow.com/questions/6491175/extjs4-problem-in-boxselectmultiselect-combobox