// CHECK CLIENT BROWSER & PLATFORM
// original code from http://developer.apple.com/internet/_javascript/
//
// USAGE:	browserNaming();
// NOTES:	call it from within an external JS document
// RESULT:	browserNew = true/false
//			browserName = IE/NS/Opera
//			browserNameLong = IE5/etc
//			Macintosh = true/false
// WORKS:	everything

	var its;
	var browserName;
	var browserNameLong;
	var browserNew;
	var preloadFlag = false;
	var Macintosh = navigator.userAgent.indexOf('Mac')>0;

	function its() {
		var n = navigator;
		var ua = ' ' + n.userAgent.toLowerCase();
		var pl = n.platform.toLowerCase();
		var an = n.appName.toLowerCase();

		// browser version
		this.version = n.appVersion;
		this.nn = ua.indexOf('mozilla') > 0;

		// 'compatible' versions of mozilla aren't navigator
		if(ua.indexOf('compatible') > 0) {
			this.nn = false;
		}
		
		this.opera = ua.indexOf('opera') > 0;
		this.ie = ua.indexOf('msie') > 0;
		this.major = parseInt( this.version );
		this.minor = parseFloat( this.version );

		// platform
		this.mac = ua.indexOf('mac') > 0;
		this.win = ua.indexOf('win') > 0;

		// workaround for IE5 which reports itself as version 4.0
		if(this.ie) {
			if(ua.indexOf("msie 5") > 1) {
			var msieIndex = navigator.appVersion.indexOf("MSIE") + 5;
			this.major = parseFloat(navigator.appVersion.substr(msieIndex,3));
			}
		}

		return this;
	}

	function browserNaming() {
		its = new its();
		
		// is it a DOM-enabled browser?
		if (!document.getElementById) {
			browserNew = false;
		}
		else {
			browserNew = true;
		}

		// need the name, too
		if (its.opera) {
			browserName = "Opera";
		}
		else if (its.ie) {
			browserName = "IE";
		}
		else {
			browserName = "NS";
		}

		// and the number
		browserNameLong = browserName + its.major;
	
	}
	

// CREATING THE MOUSEOVER IMAGES
// USAGE:	createObject('buttonoff','images/specfeature_celluar_off.gif');
// NOTES:	call it from within the preload function
// WORKS:	ie4+, ns4+, opera5

	function createObject(imgName,imgSrc) {
		if (browserNew && (browserName == "NS")) {
		// a DOM-compatible browser
		// which is probably NS6/mozilla (the other code works better in IE/Opera)
			var tempImg = document.createElement("img");
			tempImg.src = imgSrc;
			tempImg.id = imgName;
			tempImg.style.visibility = 'hidden';
			tempImg.style.position = 'absolute';
			tempImg.style.top = 0;
			document.body.appendChild(tempImg);
		}
		else {
		// a non-DOM-compatible browser
		// and IE/Opera
			eval(imgName+' = new Image()');
			eval(imgName+'.src = "'+imgSrc+'"');
		}
	}


// MOUSEOVER SWITCHING
// USAGE:	<a href="#" onmouseover="changeImage(null,'buttonname','buttonnameon');" onmouseout="changeImage(null,'buttonname','buttonnameoff');">
// NOTES:	if the image is in a DIV, substitute 'null' with the DIV name.
// WORKS:	ie4+, ns4+, opera5

	function changeImage(layer,imgName,imgObj) {
		if (preloadFlag) {
			if (browserNew && (browserName == "NS")) {
			// a DOM-compatible browser
			// which is probably NS6/mozilla (the other code works better in IE/Opera)
				thisImage = document.getElementById(imgName);
				newImage = document.getElementById(imgObj);
				newSrc = newImage.getAttribute("src");
				thisImage.setAttribute("src",newSrc);
			}
			else {
			// a non-DOM-compatible browser
			// and IE/Opera
				if ((browserName == "NS") && layer!=null) eval('document.'+layer+'.document.images["'+imgName+'"].src = '+imgObj+'.src')
				else document.images[imgName].src = eval(imgObj+".src")
			}
		}
	}


// REMOVES THE LINK BORDER IN IE5/NS6
// original code by evil@chelu.ro
//
// USAGE:	getLinksToBlur();
// NOTES:	call it from within the preload function
// WORKS:	ie5+, ns6+, opera5+

	function unblur() {
		this.blur();
	}

	function getLinksToBlur() {
		if (!document.getElementById) return
		links = document.getElementsByTagName("a");
		for(i=0; i<links.length; i++) {
			links[i].onfocus = unblur
		}
	}


// DOM / GET PROPERTY
// original code from http://www.alistapart.com/
//
// NOTES:	given an id and a property (as strings), return the given property of that id.
// WORKS:	ie5+, ns6+, opera5+

	function getIdProperty(id,property) {
		var styleObject = document.getElementById( id );
		if (styleObject != null) {
			styleObject = styleObject.style;
				if (styleObject[property]) {
					return styleObject[ property ];
				}
			}
		return (styleObject != null) ?
		styleObject[property] :
		null;
	}


// DOM / SET PROPERTY
// original code from http://www.alistapart.com/
//
// NOTES:	given an id and a property (as strings), set the given property of that id to the value provided.
// WORKS:	ie5+, ns6+, opera5+

	function setIdProperty(id,property,value) {
		var styleObject = document.getElementById( id );
		if (styleObject != null) {
			styleObject = styleObject.style;
			styleObject[ property ] = value;
		}
	}