var confTimeDelay   = 10; 
var confIterations  = 10; 
var confKoefScale   = 1; 
function ScaleUp(img,iters) { 
var i=iters; 
function UpImg() { 
if(i<=0) return 0; 
img.width += confKoefScale*i; 
window.setTimeout(UpImg, confTimeDelay); 
i--; 
} 
UpImg();
}        
function ScaleDown(img,iters) { 
var i=iters; 
function DownImg() { 
if(i<=0) return 0; 
        
img.width -= confKoefScale*i; 
window.setTimeout(DownImg, confTimeDelay); 
i--; 
} 
DownImg(); 
}