// x_util.js
// X, Cross-Browser DHTML Library from Cross-Browser.com
// Copyright (c) 2002,2003 Michael Foster (mike@cross-browser.com)
// This library is distributed under the terms of the LGPL (gnu.org)

var xDebug = true;

function xName(e) {
  if (!e) return e;
  else if (e.id && e.id != "") return e.id;
  else if (e.nodeName && e.nodeName != "") return e.nodeName;
  else if (e.tagName && e.tagName != "") return e.tagName;
  else return e;
}

function xParentChain(e,delim) {
  var lim=100, s = "", d = delim || "\n";
  while(e) {
    s += xName(e) + d;
    e = xParent(e);
    if (!lim--) break;
  }
  return s;
}

/* xGetElementsByClassName()
   Returns an array of elements which are
   descendants of parentEle and have tagName and clsName.
   If parentEle is null or not present, document will be used.
   if tagName is null or not present, "*" will be used.
*/
  
function xGetElementsByClassName(clsName, parentEle, tagName) {
	var elements = null;
	var found = new Array();
	var re = new RegExp('\\b'+clsName+'\\b');
	if (!parentEle) parentEle = document;
	if (!tagName) tagName = '*';
	if (parentEle.getElementsByTagName) {elements = parentEle.getElementsByTagName(tagName);}
	else if (document.all) {elements = document.all.tags(tagName);}
	if (elements) {
		for (var i = 0; i < elements.length; ++i) {
			if (elements[i].className.search(re) != -1) {
				found[found.length] = elements[i];
			}
		}
	}
	return found;
}

/* being used by xMenu3 */
function xHasPoint(ele, iLeft, iTop, iClpT, iClpR, iClpB, iClpL) {
  if (iClpT==null){iClpT=iClpR=iClpB=iClpL=0;}
  else if (iClpR==null){iClpR=iClpB=iClpL=iClpT;}
  else if (iClpB==null){iClpL=iClpR; iClpB=iClpT;}
  var thisX = xPageX(ele), thisY = xPageY(ele);
  return (iLeft >= thisX + iClpL && iLeft <= thisX + xWidth(ele) - iClpR &&
          iTop >=thisY + iClpT && iTop <= thisY + xHeight(ele) - iClpB );
}
/* original:
function xHasPoint(ele, iLeft, iTop, iClpT, iClpR, iClpB, iClpL) {
  if (arguments.length==3){iClpT=iClpR=iClpB=iClpL=0;}
  else if (arguments.length==4){iClpR=iClpB=iClpL=iClpT;}
  else if (arguments.length==5){iClpL=iClpR; iClpB=iClpT;}
  var thisX = xPageX(ele), thisY = xPageY(ele);
  return (iLeft >= thisX + iClpL && iLeft <= thisX + xWidth(ele) - iClpR &&
          iTop >=thisY + iClpT && iTop <= thisY + xHeight(ele) - iClpB );
}
*/


/*
  NN4 support for x.js:
*/
function xLayer(id,root) { // only for nn4
  var i,layer,found=null;
  if (!root) root=window;
  for(i=0; i<root.document.layers.length; i++) {
    layer=root.document.layers[i];
    if(layer.id==id) return layer;
    if(layer.document.layers.length) found=xLayer(id,layer);
    if(found) return found;
  }
  return null;
}
function xLayerFromPoint(x,y,root) { // only for nn4
  var i, hn=null, hz=-1, cn;
  if (!root) root = window;
  for (i=0; i < root.document.layers.length; ++i) {
    cn = root.document.layers[i];
    if (cn.visibility != "hide" && x >= cn.pageX && x <= cn.pageX + cn.clip.right && y >= cn.pageY && y <= cn.pageY + cn.clip.bottom ) {
      if (cn.zIndex > hz) { hz = cn.zIndex; hn = cn; }
    }
  }
  if (hn) {
    cn = xLayerFromPoint(x,y,hn);
    if (cn) hn = cn;
  }
  return hn;
}

// end x_util.js