<script type='text/JavaScript'>
function func(name,width,height,duration,type){  
var img=document.images.im, heightOk=0, widthOk=0; 
if(type==true){  
if ((h<height)&&(w<width)){ 
if(img.height<height)img.height++;  
else heightOk=1; 
if(img.width<width) img.width++; 
else widthOk=1; 
} 
if ((h>height)&&(w>width)){ 
if(img.height>height)img.height--; 
else heightOk=1; 
if(img.width>width)img.width--; 
else widthOk=1; 
} 
if ((h>height)&&(w<width)){ 
if(img.height>height)img.height--;  
else heightOk=1; 
if(img.width<width) img.width++; 
else widthOk=1; 
} 
if ((h<height)&&(w>width)){ 
if(img.height<height)img.height++;  
else heightOk=1; 
if(img.width>width) img.width--; 
else widthOk=1; 
} 
if(heightOk+widthOk==2) setTimeout(func,duration,name,width,height,duration,false); 
else setTimeout(func,duration,name,width,height,duration,true); 
} 
else if(type==false) { 
if ((h<height)&&(w<width)){ 
if(img.height>h)img.height--; 
else heightOk=1; 
if(img.width>w)img.width--; 
else widthOk=1; 
} 
if ((h>height)&&(w>width)){ 
if(img.height<h)img.height++; 
else heightOk=1; 
if(img.width<w)img.width++; 
else widthOk=1; 
} 
if ((h>height)&&(w<width)){ 
if(img.height<h)img.height++; 
else heightOk=1; 
if(img.width>w)img.width--; 
else widthOk=1; 
} 
if ((h<height)&&(w>width)){ 
if(img.height>h)img.height--; 
else heightOk=1; 
if(img.width<w)img.width++; 
else widthOk=1; 
} 
if(heightOk+widthOk!=2) setTimeout(func,duration,name,width,height,duration,false); 
else setTimeout(func,duration,name,width,height,duration,true); 
} 
} 
var h = document.images.im.height; 
var w = document.images.im.width; 
var width = Number(prompt("Ведите максимальную ширину")); 
var height = Number(prompt("Ведите максимальную высоту")); 
var duration = Number(prompt("Ведите milliseconds")); 
func('i', width, height, duration, true);
</script>