function setZoom(img,dir,width,height,margin,zIndex,delay){setTimeout(function(){if(img.dir==dir){img.style.width=width;img.style.height=height;img.style.margin=margin;img.style.zIndex=zIndex;img.parentNode.parentNode.style.zIndex=zIndex;}},delay);}
function larger(img,width,height){img.dir='rtl';now=parseInt(img.style.zIndex);for(i=now+1;i<=10;i++){w=(width*(10+i))/20+'px';h=(height*(10+i))/20+'px';m=(-i)+'px 0 0 '+(-width*i/40)+'px';setZoom(img,'rtl',w,h,m,i,20*(i-now));}}
function smaller(img,width,height){img.dir='ltr';now=parseInt(img.style.zIndex);for(i=now-1;i>=0;i--){w=(width*(10+i))/20+'px';h=(height*(10+i))/20+'px';m=(-i)+'px 0 0 '+(-width*i/40)+'px';setZoom(img,'ltr',w,h,m,i,20*(now-i));}}