// ------------------------------------------------------------
// general functions - based on Apple Developer documentation *
// ------------------------------------------------------------
function getImage(name) {
  if (document.layers) {
    return findImage(name, document);
  }
  return null;
}

function findImage(name, doc) {
  var i, img;
  for (i = 0; i < doc.images.length; i++)
    if (doc.images[i].name == name)
      return doc.images[i];
  for (i = 0; i < doc.layers.length; i++)
    if ((img = findImage(name, doc.layers[i].document)) != null) {
      img.container = doc.layers[i];
      return img;
    }
  return null;
}

function getImagePageLeft(img) {
  var x, obj;
  if (document.layers) {
    if (img.container != null)
      return img.container.pageX + img.x;
    else
      return img.x;
  }
  return -1;
}

function getImagePageTop(img) {
  var y, obj;
  if (document.layers) {
    if (img.container != null)
      return img.container.pageY + img.y;
    else
      return img.y;
  }
  return -1;
}

function getStyleObject(objectId) {
    // cross-browser function to get an object's style object given its id
    if(document.getElementById && document.getElementById(objectId)) {
	// W3C DOM
	return document.getElementById(objectId).style;
    } else if (document.all && document.all(objectId)) {
	// MSIE 4 DOM
	return document.all(objectId).style;
    } else if (document.layers && document.layers[objectId]) {
	// NN 4 DOM.. note: this won't find nested layers
	return document.layers[objectId];
    } else {
	return false;
    }
} // getStyleObject

function changeObjectVisibility(objectId, newVisibility) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.visibility = newVisibility;
	return true;
    } else {
	//we couldn't find the object, so we can't change its visibility
	return false;
    }
} // changeObjectVisibility

function moveObject(objectId, newXCoordinate, newYCoordinate) {
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.left = newXCoordinate;
	styleObject.top = newYCoordinate;
	return true;
    } else {
	// we couldn't find the object, so we can't very well move it
	return false;
    }
} // moveObject

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function mark(face,field_color,text_color){
	if (document.documentElement){//if browser is IE5+ or NS6+
		face.style.backgroundColor=field_color;
		face.style.color=text_color;
	}
}

function openWin(theURL,winName,features) {
	var newwindow = window.open(theURL,winName,features);
	if (window.focus) { newwindow.focus(); }
}

function toggleVisibility(divName) {
	var div = document.getElementById(divName);
	if (div.style.display == "none") {
		div.style.display = "block";
	} else {
		div.style.display = "none";
	}
}

function setVisibility(divName, visibility){
	document.getElementById(divName).style.display = visibility;
}

/* set the first target to visible and the subsequent targets to not visibile*/
function toggleVisibilityUnique(targets){
	for ( var x = 0; x < targets.length ; x++ )	{
		var div = document.getElementById(targets[x]);
		if (x == 0) div.style.display = "block";
		else div.style.display = "none";
	}
}

function calculate(obj, limit, write_to_name){
	//if space is not counted then uncomment below
	//nu=obj.value.replace(/\s/g,'').length;
	nu = obj.value.length;
	difference = limit - nu;
	if (difference < 0) difference = 0;
	document.getElementById(write_to_name).innerHTML= "You have "+ (difference) +" characters left";
}


function goBack() {
	window.history.go(-1);	
}

function redirect(url, replaceUrl) {
	if (replaceUrl == undefined) replaceUrl = false;
	if (replaceUrl) {
		location.replace(url);
	} else {
		location.href = url;	
	}
}

function $(id) {
	return document.getElementById(id);	
}

function toggleFAQ(id) {
	var q = $('faq_q_' + id);
	var a = $('faq_a_' + id);
	
	if (a.style.display == 'block') {
		a.style.display = 'none';
		q.className = '';
	} else {
		a.style.display = 'block';
		q.className = 'on';
	}
}