iconCls 所有屬性值：
| icon-add | icon-print | icon-mini-add | icon-cvs | icon-play | icon-refresh |
| icon-edit | icon-help | icon-mini-edit | icon-pencil | ||
| icon-remove | icon-undo | icon-mini-refresh | |||
| icon-save | icon-redo | ||||
| icon-cut | icon-back | ||||
| icon-ok | icon-sum | ||||
| icon-no | icon-tip | ||||
| icon-cancel | icon-filter | ||||
| icon-reload | icon-blank | ||||
| icon-search | |||||