桥接模式（将抽象与其实现隔离开来，以便二者独立变化）
function sendInfo(element){
var id=element.id;
ajax("GET","info.json?id="+id,function(result){
//...
});
//...
};
上例的ajax请求与sendInfo函数可以拆分开
function sendInfo(element){
var id=element.id,
callback=function(result){
//...
};
sendInfoBridge(id,callback);
}
function sendInfoBridge(id,callback){
ajax("GET","info.json?id="+id,function(result){
callback(result);
});
}
组合模式（用一条命令在多个对象上激发复杂的或递归的行为），组合对象和叶对象
条件一：存在一批组织成某种层次体系的对象
条件二：希望对这批对象或其中一部分对象进行操作
组合对象
var Composite=new Interface('Composite',['add','remove','getChild']);
var GalleryItem=new Interface('GalleryItem',['hide','show']);
var DynamicGallery=function(id){
this.children=[];
this.element=document.createElement('div');
this.element.id=id;
this.element.className='dynamic-gallery';
}
DynamicGallery.prototype={
add:function(child){
Interface.ensureImplements(child,Composite,GalleryItem);
this.children.push(child);
this.element.appendChild(child.getElement());
},
remove:function(child){
for(var node,i=0;node=this.getChild(i);i++){
if(node==child){
this.children.splice(i,1);
break;
}
}
this.element.removeChild(child.getElement());
},
getChild:function(i){
return this.children[i];
},
hide:function(){
for(var node,i=0;node=this.getChild(i);i++){
node.hide();
}
this.element.style.display='none';
},
show:function(){
this.element.style.display='block';
for(var node,i=0;node=this.getChild(i);i++){
node.show();
}
},
getElement:function(){
return this.element;
}
};
叶对象
var GalleryImage=function(src){
this.element=dicument.createElement('img');
this.element.className='gallery-image';
this.element.src=src;
}
GalleryImage.prototype={
add:function(){},
remove:function(){},
getChild:function(){},
hide:function(){
this.element.style.display='none';
},
show:function(){
this.element.style.display='';
},
getElement:function(){
return this.element;
}
};
var topGallery=new DynamicGallery('top-gallery');
topGallery.add(new GalleryImage('/img/image-1.jpg'));
topGallery.add(new GalleryImage('/img/image-2.jpg'));
topGallery.add(new GalleryImage('/img/image-3.jpg'));
var vacationPhotos=new DynamicGallery('vacation-photos');
for(var i=0;i<30;i++){
vacationPhotos.add(new GalleryImage('/img/vac/image-'+i+'.jpg'));
}
topGallery.add(vacationPhotos);
topGallery.show();
vacationPhotos.hide();