/*
dhtmllib.js
Functions tested with:
IE5+, NS4, NS6

*/
// Determine browser.
var  IG_DOM = (document.getElementById) ? true : false;
var  IG_NS4 = (document.layers) ? true : false;
var  IG_IE = (document.all) ? true : false;
var  IG_IE4 = IG_IE && !IG_DOM;
var  IG_Mac = (navigator.appVersion.indexOf("Mac") != -1);
var  IG_IE4M = IG_IE4 && IG_Mac;
var  IG_Opera = (navigator.userAgent.indexOf("Opera")!=-1);
var  IG_Konqueror = (navigator.userAgent.indexOf("Konqueror")!=-1);
var  IG_NS6  = IG_DOM && !IG_IE && !IG_Konqueror

var  isDHTML = !IG_Opera && !IG_IE4M && (IG_DOM || IG_NS4 || IG_IE4 || IG_Konqueror);

// reload protection for NS4 Browsers 
if (IG_NS4) {
	origWidth = innerWidth;
	origHeight = innerHeight;
}
function IG_reDoNS() {
	if (innerWidth != origWidth || innerHeight != origHeight) location.reload();
}
if (IG_NS4) onresize = IG_reDoNS;
//----------------------------------------------------------------
// Layer visibility.
//----------------------------------------------------------------

function IG_setLayerVis(layer, bVis) { //ver 2.0

  if (IG_NS4)
    layer.visibility = (bVis)? "show" : "hide";
  if (IG_IE||IG_DOM)
    layer.style.visibility = (bVis)? "visible" : "hidden";
}

function IG_isVisible(layer) { //ver 2.0

  if (IG_NS4 && layer.visibility == "show")
    return(true);
  if ((IG_IE||IG_DOM) && layer.style.visibility == "visible")
    return(true);

  return(false);
}

//----------------------------------------------------------------
// Layer positioning.
//----------------------------------------------------------------

function IG_moveLayerTo(layer, x, y) {//ver 2.0

  if (IG_NS4)
    layer.moveTo(x, y);
  if (IG_IE) {
    layer.style.pixelLeft = x;
    layer.style.pixelTop  = y;
  }
  if (IG_DOM){
    layer.style.left = x + 'px';
	layer.style.top  = y + 'px';
  }
}

function IG_moveLayerBy(layer, dx, dy) {//ver 2.0

  if (IG_NS4)
    layer.moveBy(dx, dy);
  if (IG_IE) {
    layer.style.pixelLeft += dx;
    layer.style.pixelTop  += dy;
  }
  if (IG_DOM) {
    layer.style.left = parseInt(layer.style.left) + dx + 'px';
	layer.style.top = parseInt(layer.style.top) + dy + 'px';
  }
}

function IG_getLayerLeft(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.left);
  if (IG_IE)
    return(layer.style.pixelLeft);
  if (IG_DOM)
    return(parseInt(layer.style.left))
  return(-1);
}

function IG_getLayerTop(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.top);
  if (IG_IE)
    return(layer.style.pixelTop);
  if (IG_DOM)
    return(parseInt(layer.style.top))
  return(-1);
}

function IG_getRight(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.left + IG_getWidth(layer));
  if (IG_IE)
    return(layer.style.pixelLeft + IG_getWidth(layer));
  if (IG_DOM)
    return(parseInt(layer.style.left)+ IG_getWidth(layer));
  return(-1);
}

function IG_getBottom(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.top + IG_getHeight(layer));
  else if (IG_IE)
    return(layer.style.pixelTop + IG_getHeight(layer));
  if (IG_DOM)
    return(parseInt(layer.style.top)+ IG_getHeight(layer));
  return(-1);
}

function IG_getWidth(layer) { //ver 2.0

  if (IG_NS4) {
    if (layer.document.width)
      return(layer.document.width);
    else
      return(layer.clip.right - layer.clip.left);
  }
  if (IG_IE) {
    if (layer.style.pixelWidth)
      return(layer.style.pixelWidth);
    else
      return(layer.clientWidth);
  }
  if (IG_DOM) {
    return(parseInt(layer.style.width))
  }
  return(-1);
}

function IG_getHeight(layer) { // ver 2.0

  if (IG_NS4) {
    if (layer.document.height)
      return(layer.document.height);
    else
      return(layer.clip.bottom - layer.clip.top);
  }
  if (IG_IE) {
    if (false && layer.style.pixelHeight)
      return(layer.style.pixelHeight);
    else
      return(layer.clientHeight);
  }
  if (IG_DOM) {
    return(parseInt(layer.style.height))
  }
  return(-1);
}

function IG_getzIndex(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.zIndex);
  if (IG_IE||IG_DOM)
    return(layer.style.zIndex);

  return(-1);
}

function IG_setzIndex(layer, z) { //ver 2.0

  if (IG_NS4)
    layer.zIndex = z;
  if (IG_IE||IG_DOM)
    layer.style.zIndex = z;
}

//----------------------------------------------------------------
// Layer clipping.
//----------------------------------------------------------------
function IG_clipLayer(layer, clipleft, cliptop, clipright, clipbottom) {//ver 2.0

  if (IG_NS4) {
    layer.clip.left   = clipleft;
    layer.clip.top    = cliptop;
    layer.clip.right  = clipright;
    layer.clip.bottom = clipbottom;
  }
  if (IG_IE||IG_DOM)
    layer.style.clip = 'rect(' + cliptop + ' ' +  clipright + ' ' + clipbottom + ' ' + clipleft +')';
}

function IG_getClipLeft(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.clip.left);
  if (IG_IE||IG_DOM) {
    var str =  layer.style.clip;
    if (!str)
      return(0);
    var clip = IG_parseClipValues(layer.style.clip);
    return(clip[3]);
  }
  return(-1);
}

function IG_getClipTop(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.clip.top);
  if (IG_IE||IG_DOM) {
    var str =  layer.style.clip;
    if (!str)
      return(0);
    var clip = IG_parseClipValues(layer.style.clip);
    return(clip[0]);
  }
  return(-1);
}

function IG_getClipRight(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.clip.right);
  if (IG_IE||IG_DOM) {
    var str =  layer.style.clip;
    if (!str)
      return(layer.style.pixelWidth);
    var clip = IG_parseClipValues(layer.style.clip);
    return(clip[1]);
  }
  return(-1);
}

function IG_getClipBottom(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.clip.bottom);
  if (IG_IE||IG_DOM) {
    var str =  layer.style.clip;
    if (!str)
      return(layer.style.pixelHeight);
    var clip = IG_parseClipValues(layer.style.clip);
    return(clip[2]);
  }
  return(-1);
}

function IG_getClipWidth(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.clip.width);
  if (IG_IE||IG_DOM) {
    var str = layer.style.clip;
    if (!str)
      return(layer.style.pixelWidth);
    var clip = IG_parseClipValues(layer.style.clip);
    return(clip[1] - clip[3]);
  }
  return(-1);
}

function IG_getClipHeight(layer) {//ver 2.0

  if (IG_NS4)
    return(layer.clip.height);
  if (IG_IE||IG_DOM) {
    var str =  layer.style.clip;
    if (!str)
      return(layer.style.pixelHeight);
    var clip = IG_parseClipValues(layer.style.clip);
    return(clip[2] - clip[0]);
  }
  return(-1);
}

function IG_parseClipValues(str) {

  var clip = new Array();
  var i;

  // Parse out the clipping values for IE & NS6 layers.

  i = str.indexOf("(");
  clip[0] = parseInt(str.substring(i + 1, str.length), 10);
  i = str.indexOf(" ", i + 1);
  clip[1] = parseInt(str.substring(i + 1, str.length), 10);
  i = str.indexOf(" ", i + 1);
  clip[2] = parseInt(str.substring(i + 1, str.length), 10);
  i = str.indexOf(" ", i + 1);
  clip[3] = parseInt(str.substring(i + 1, str.length), 10);
  return(clip);
}

//----------------------------------------------------------------
// Layer scrolling.
//----------------------------------------------------------------
function IG_scrollLayerTo(layer, x, y, bound) {

  var dx = IG_getClipLeft(layer) - x;
  var dy = IG_getClipTop(layer) - y;

  IG_scrollLayerBy(layer, -dx, -dy, bound);
}

function IG_scrollLayerBy(layer, dx, dy, bound) {

  var cl = IG_getClipLeft(layer);
  var ct = IG_getClipTop(layer);
  var cr = IG_getClipRight(layer);
  var cb = IG_getClipBottom(layer);

  if (bound) {
    if (cl + dx < 0)

      dx = -cl;

    else if (cr + dx > IG_getWidth(layer))
      dx = IG_getWidth(layer) - cr;
    if (ct + dy < 0)

      dy = -ct;

    else if (cb + dy > IG_getHeight(layer))
      dy = IG_getHeight(layer) - cb;
  }

  IG_clipLayer(layer, cl + dx, ct + dy, cr + dx, cb + dy);
  IG_moveLayerBy(layer, -dx, -dy);
}

//----------------------------------------------------------------
// Layer background.
//----------------------------------------------------------------
function IG_setBgColor(layer, color) { //ver 2.0
  if (IG_NS4)
    layer.bgColor = color;
  if (IG_IE||IG_DOM)
    layer.style.backgroundColor = color;
}

function IG_setBgImage(layer, src) { //ver 2.0
  if (IG_NS4)
    layer.background.src = src;
  if (IG_IE||IG_DOM)
    layer.style.backgroundImage = "url(" + src + ")";
}

//----------------------------------------------------------------
// Layer utilities.
//----------------------------------------------------------------
function IG_beginLayer(objBase,strName,z,vis,l,t,w,h,extra,ieStyleExtra){ //ver 2.0	
	if (h==null) h=0;  
	if (w==null) w='100%';  
	if (w==0) w=1;  
	if (t==null) t=0;  
	if (l==null) l=0;  
	(vis==false)? vis= (IG_DOM||IG_IE)? "hidden" : "hide" : vis= (IG_DOM||IG_IE)? "visible" : "show";
	if (vis==null) vis= (IG_DOM||IG_IE)? "hidden" : "hide";  
	if (z==null) z=10; 
	if (extra==null) extra='';   
	if (ieStyleExtra==null) ieStyleExtra='';   

	if (IG_IE||IG_DOM){
		document.write('<DIV ID="'+strName+'" STYLE="position:absolute; overflow:none; left:'+l+'px; top:'+t+'px; width:'+w+'px; height:'+h+'px; visibility:'+vis+'; z-index:'+z+';');
		if (ieStyleExtra.length > 0){
			document.write(' '+ieStyleExtra);
		}
		document.writeln('" '+extra+'>');
	}
	if (IG_NS4){
		objBase.document.writeln('<LAYER NAME="'+strName+'" left="'+l+'" top="'+t+'" width="'+w+'" height="'+h+'" visibility="'+vis+'" z-index="'+z+'" '+extra+'>'); 
	}
}
	
function IG_writeLayer(objBase,strName,content,z,vis,l,t,w,h,extra){ //ver 2.0
	IG_beginLayer(objBase,strName,z,vis,l,t,w,h,extra);
	if (IG_IE||IG_DOM) document.writeln(content +'</DIV>');
	if (IG_NS4) objBase.document.writeln(content +'</LAYER>'); 
}
	
function IG_endLayer(objBase){ //ver 2.0
	if (IG_IE||IG_DOM) {document.writeln('</DIV>');}
	if (IG_NS4) {objBase.document.writeln('</LAYER>');} 
}

function IG_setLayerResize(layer, nWidth, nHeight) { //ver 2.0
	if (IG_IE){
		layer.style.width = nWidth;
		layer.style.height = nHeight;
		return;
	} 
	if (IG_DOM){
		layer.style.width = nWidth + 'px'
		layer.style.height= nHeight + 'px'
		return;
	}
	if (IG_NS4){
		layer.resizeTo(nWidth, nHeight);
		return;
	} 
}

function IG_setLayerContent(layer, strText) { //ver 2.0		
	if (IG_NS4){
		layer.document.open();
		layer.document.write(strText);
		layer.document.close();
	}
	else if (IG_IE||IG_DOM){
		layer.innerHTML = strText;
	}
}

function IG_findLayer(name, doc) { // Netscape 4 only
  var i, layer;
  for (i = 0; i < doc.layers.length; i++) {
    layer = doc.layers[i];
    if (layer.name == name)
      return layer;
    if (layer.document.layers.length > 0) {
      layer = IG_findLayer(name, layer.document);
      if (layer != null)
        return layer;
    }
  }
  return null;
}
function IG_getLayer(name) { //ver 2.0
  if (IG_DOM){
    return document.getElementById(name);}
  if (IG_NS4){
    return IG_findLayer(name, document);}
  if (IG_IE4){
    return document.all[name];}

  return null;
}


//----------------------------------------------------------------
// Window and page properties.
//----------------------------------------------------------------

function IG_getWindowWidth() { //ver 2.0

  if (IG_NS4||IG_NS6)
    return(window.innerWidth);
  if (IG_IE)
    return(document.body.clientWidth);
  return(-1);
}

function IG_getWindowHeight() { //ver 2.0

  if (IG_NS4||IG_NS6)
    return(window.innerHeight);
  if (IG_IE)
    return(document.body.clientHeight);
  return(-1);
}

function IG_getPageWidth() { //ver 2.0

  if (IG_NS4||IG_NS6)
    return(document.width);
  if (IG_IE)
    return(document.body.scrollWidth);
  return(-1);
}

function IG_getPageHeight() { //ver 2.0

  if (IG_NS4||IG_NS6)
    return(document.height);
  if (IG_IE)
    return(document.body.scrollHeight);
  return(-1);
}

function IG_getPageScrollX() { //ver 2.0
  if (IG_NS4||(IG_DOM&&!IG_IE))
    return(window.pageXOffset);
  if (IG_IE)
    return(document.body.scrollLeft);
  return(-1);
}

function IG_getPageScrollY() { //ver 2.0
  if (IG_NS4||(IG_DOM&&!IG_IE))
    return(window.pageYOffset);
  if (IG_IE)
    return(document.body.scrollTop);
  return(-1);
}

//----------------------------------------------------------------
// Functions to get anchor locations in the document.
// make sure to call this function after the page loads
//----------------------------------------------------------------
function IG_getLeft(ll) {
  if (ll.offsetParent){return (ll.offsetLeft + IG_getLeft(ll.offsetParent));}
  else {return (ll.offsetLeft);}
}

function IG_getTop(ll) {
  if (ll.offsetParent){return (ll.offsetTop + IG_getTop(ll.offsetParent));}
  else {return (ll.offsetTop);}
}

function IG_getAnchorPos(anchorName){
  var anchorObj = (IG_IE)? eval("document.all['"+anchorName+"']") : eval("document.anchors['"+anchorName+"']");
  alert(anchorObj);
  var top  =(IG_IE)? IG_getTop(anchorObj) : (IG_NS4)? anchorObj.y : anchorObj.offsetTop;
  var left =(IG_IE)? IG_getLeft(anchorObj) : (IG_NS4)? anchorObj.x : anchorObj.offsetLeft;
  returnArray = [top,left]
  return returnArray;
}