function ravno() {

	var h1 = document.getElementById("left").offsetHeight;

	document.getElementById("grey_block").style.height = h1 - 350 + "px";

}
function popup(src,width,height)
{
    if (!width) width=600;
    if (!height) height=620;
	window.open(src, 'popup', 'height='+height+',width='+width+',resizable=1,scrollbars=1,status=0,toolbar=0,top=100,left=100', true);
	return false;
}