// Image Object Functions
// The following code is copyright Robert Fisher, 9th Sept 2006 (www.fisher-solutions.co.uk)
// THIS IS A FISHER SOLUTIONS CORE JS LIBRARY
// you may freely copy and distribute this code but please keep the copyright notice as well
// (thanks to Stephen Chapman for the crossbrowser xDOM function)
function image_preloader(images) {
	// Loads a provided array of image references.
    // Counter     
	var i = 0;
    // Start preloading
    for(i=0; i<=(images.length-1); i++){  preloadimage(images[i]);  }
} 
function preloadimage(imageref){
		imageObj = new Image();
		imageObj.src=imageref;
		return imageObj;
}
function swapimage(imageID, newsrc) {
	// Replaces an image objects source with the provided images reference.
	//var mysrc = getimagesrc(objectID);
	document.images[imageID].src = newsrc;
	return newsrc;
}
function getimagesrc(imageID){
	//Returns the source property of an image object.
	//var objs = xDOM(objectID,1);
	return document.images[imageID].src ;
}
			
function set_elementnode_value(elementId, newValue) {
	//Replaces the text value on a given html node.
	elem = document.getElementById(elementId);
	elem.firstChild.nodeValue = newValue;
}
// Object Functions
function objWidth(objectID) {
	var obj = xDOM(objectID,0); if(obj.offsetWidth) return  obj.offsetWidth; if (obj.clip) return obj.clip.width; return 0;
}
function objHeight(objectID) {
	var obj = xDOM(objectID,0); if(obj.offsetHeight) return  obj.offsetHeight; if (obj.clip) return obj.clip.height; return 0;
}
function objLeft(objectID) {
	var obj = xDOM(objectID,0);var objs = xDOM(objectID,1); if(objs.left) return objs.left; if (objs.pixelLeft) return objs.pixelLeft; if (obj.offsetLeft) return obj.offsetLeft; return 0;
} 
function objTop(objectID) {
	var obj = xDOM(objectID,0);var objs = xDOM(objectID,1); if(objs.top) return objs.top; if (objs.pixelTop) return objs.pixelTop; if (obj.offsetTop) return obj.offsetTop; return 0;
} 
function objRight(objectID) {
	return objLeft(objectID)+objWidth(objectID);
}
function objBottom(objectID) {
	return objTop(objectID)+objHeight(objectID);
}
function objLayer(objectID) {
	var objs = xDOM(objectID,1); if(objs.zIndex) return objs.zIndex; return 0;
} 
function objVisible(objectID) {
	var objs = xDOM(objectID,1); if(objs.visibility == 'hide' || objs.visibility == 'hidden') return 'hidden'; return 'visible';
}
// More Object Functions
function setObjVis(objectID,vis) {
	var objs = xDOM(objectID,1);
	//alert(typeof objs);
	if (typeof objs == "object") {
		objs.visibility = vis;
	}
}
function toggleObjVis(objectID) {
	var objs = xDOM(objectID,1); var vis = objs.visibility; objs.visibility = (vis == "visible" || vis == "show") ? 'hidden' : 'visible';
}
function moveObjTo(objectID,x,y) {
	var objs = xDOM(objectID,1); objs.left = x; objs.top = y;
}
function moveObjBy(objectID,x,y) {
	var obj = xDOM(objectID,0);var objs = xDOM(objectID,1); if (obj.offsetLeft != null) {var l = obj.offsetLeft; var t = obj.offsetTop; objs.left = l+x; objs.top = t+y;} else if (objs.pixelLeft != null) {objs.pixelLeft += x; objs.pixelTop += y;} else obj.moveBy(x,y);
}
function moveObjLayer(objectID,z) {
	var objs = xDOM(objectID,1); objs.zIndex = z;
}
// Browser Window Size and Position
function pageWidth() {
	return window.innerWidth != null? window.innerWidth : document.documentElement && document.documentElement.clientWidth ?       document.documentElement.clientWidth : document.body != null ? document.body.clientWidth : null;
} 
function pageHeight() {
	return  window.innerHeight != null? window.innerHeight : document.documentElement && document.documentElement.clientHeight ?  document.documentElement.clientHeight : document.body != null? document.body.clientHeight : null;
} 
function posLeft() {
	return typeof window.pageXOffset != 'undefined' ? window.pageXOffset :document.documentElement && document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft ? document.body.scrollLeft : 0;
} 
function posTop() {
	return typeof window.pageYOffset != 'undefined' ?  window.pageYOffset : document.documentElement && document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop ? document.body.scrollTop : 0;
} 
function posRight() {
	return posLeft()+pageWidth();
} 
function posBottom() {
	return posTop()+pageHeight();
}
// Cross Browser DOM
// copyright Stephen Chapman, 4th Jan 2005
// you may copy this code but please keep the copyright notice as well
var aDOM = 0, ieDOM = 0, nsDOM = 0;
var stdDOM = document.getElementById;
if (stdDOM) aDOM = 1; else {ieDOM = document.all;if (ieDOM) aDOM = 1; else {var nsDOM = ((navigator.appName.indexOf('Netscape') != -1) && (parseInt(navigator.appVersion) ==4)); if (nsDOM) aDOM = 1;}}
function xDOM(objectId, wS) {
	try {
		if (stdDOM) return wS ? document.getElementById(objectId).style:document.getElementById(objectId);
		if (ieDOM) return wS ? document.all[objectId].style: document.all[objectId];
		if (nsDOM) return document.layers[objectId];
	} catch (error) {
		return "no object"
	}
}