var h_prod=document.getElementById("prod_block").clientHeight;
var h_part=document.getElementById("scroll_view").clientHeight;

document.getElementById("part_block").style.height=h_prod+"px";
document.getElementById("scroll_div").style.height=h_prod-20+"px";

if(h_part<h_prod)
{
document.getElementById("scroll_up").style.visibility="hidden";
document.getElementById("scroll_down").style.visibility="hidden";
document.getElementById("scroll_div").style.borderRightColor="#FFFFFF";
}