// moving advertisement
// copyright matousec.com

function getScrollXY() {
  var scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
  }
  return scrOfY;
}

function admove_init() {
	ad_element = window.document.getElementById("left_bg");
	ad_offset_top = ad_element.offsetTop;
	ad_offset_left = ad_element.offsetLeft;
	admove();
}

function admove() {
	ad_element = window.document.getElementById("left_bg");
	scrollY = getScrollXY();
	if ((scrollY + 32) > ad_offset_top) {
		ad_element.style.position = "absolute";
		var newpos = scrollY + 32;
		ad_element.style.top = newpos + "px";
		ad_element.style.left = ad_offset_left + "px";
	}
	else {
		ad_element.style.position = "absolute";
		var newpos = ad_offset_top;
		ad_element.style.top = newpos + "px";
		ad_element.style.left = ad_offset_left + "px";		
	}
}

var ad_element;
var ad_offset_top;
var ad_offset_left;
window.onload = admove_init;
window.onscroll = admove;