function image_size(id_id, variant, dir){
	var id_img = document.getElementById("img_"+id_id);
	var lupa = document.getElementById("lupa_"+id_id);
	var img_a = document.getElementById("img_a_"+id_id);
	var main_table = document.getElementById("main_table");
		
	if(variant == "big"){
		main_table.align = "center";
		id_img.width=442;
		id_img.height=442;
		id_img.src="images_"+dir+"/big/"+id_id+".jpg";
		lupa.innerHTML="<a href=\"javascript:image_size('"+id_id+"', 'small', '"+dir+"')\"><img src='images/lupa_um.gif' border=0 alt='уменьшить' width='78' height='11'></a>";		
		img_a.href = "javascript:image_size('"+id_id+"', 'small', '"+dir+"')";
	}else{
		main_table.align = "left";
		id_img.width=120;
		id_img.height=120;
		id_img.src="images_"+dir+"/"+id_id+".jpg";
		lupa.innerHTML="<a href=\"javascript:image_size('"+id_id+"', 'big', '"+dir+"')\"></font><img src='images/lupa_uv.gif' border=0 alt='увеличить' width='75' height='11'></a>";		
		img_a.href = "javascript:image_size('"+id_id+"', 'big', '"+dir+"')";
	}
}