// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/

function getAnchorPosition(anchorname) {
var useWindow=false;
var coordinates=new Object();
var x=0,y=0;

var use_gebi=false, use_css=false, use_layers=false;
if (document.getElementById) { use_gebi=true;}
  else if (document.all) { use_css=true; }
  else if (document.layers) { use_layers=true;}
if (use_gebi && document.all) {
  x=AnchorPosition_getPageOffsetLeft(document.all[anchorname]);y=AnchorPosition_getPageOffsetTop(document.all[anchorname]);}
else if (use_gebi) {
    var o=document.getElementById(anchorname);x=AnchorPosition_getPageOffsetLeft(o);y=AnchorPosition_getPageOffsetTop(o);
  }
  else if (use_css) {
    x=AnchorPosition_getPageOffsetLeft(document.all[anchorname]);y=AnchorPosition_getPageOffsetTop(document.all[anchorname]);
  }
else if (use_layers) {
  var found=0;
  for (var i=0; i<document.anchors.length; i++) {
	if (document.anchors[i].name==anchorname) { found=1; break; }
  }
  if (found==0) {
    coordinates.x=0; coordinates.y=0; return coordinates;}
    x=document.anchors[i].x;y=document.anchors[i].y;
  }
  else {
    coordinates.x=0; coordinates.y=0; return coordinates;
  }
  coordinates.x=x;coordinates.y=y;return coordinates;
}
function AnchorPosition_getPageOffsetLeft (el) {
var ol=el.offsetLeft;
while ((el=el.offsetParent) != null) { ol += el.offsetLeft;}
return ol;}
function AnchorPosition_getWindowOffsetLeft (el) {
return AnchorPosition_getPageOffsetLeft(el)-document.body.scrollLeft;}	
function AnchorPosition_getPageOffsetTop (el) {
var ot=el.offsetTop;
while((el=el.offsetParent) != null) { ot += el.offsetTop;}
return ot;}
function AnchorPosition_getWindowOffsetTop (el){
return AnchorPosition_getPageOffsetTop(el)-document.body.scrollTop;}