                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /搜索框制作

最后代码里面的keyup是从哪里来的

addEvent("search_input","keyup" function(){
           getDOM(search-suggest).style.top=getElementTop(getDOM(search-form))+38+'px';
           getDOM(search-suggest).style.left=getElementLeft(getDOM(search-form))+'px';
           getDOM(search-suggest).style.position="absolute";
           getDOM(search-suggest).style.display="none";
       });