//** Stay on Top content script- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com.

//** Script available at usage terms at http://www.dynamicdrive.com

//** v1.0 (May 12th, 09')



var alwaysOnTop={



	dsettings: {

		targetid: '',

		orientation: 2,

		position: [10, 30],

		externalsource: '',

		frequency: 1,

		hideafter: 0,

		fadeduration: [500, 500],

		display: 0 //internal setting on whether to display target element at all (based on frequency setting)

  },



	settingscache: {},



	positiontarget:function($target, settings){

		var fixedsupport=!document.all || document.all && document.compatMode=="CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode

		var posoptions={position:fixedsupport? 'fixed':'absolute', visibility:'visible'}

		if (settings.fadeduration[0]>0) //if fade in

			posoptions.opacity=0

		posoptions[(/^[13]$/.test(settings.orientation))? 'left' : 'right']=settings.position[0]

		posoptions[(/^[12]$/.test(settings.orientation))? 'top' : 'bottom']=settings.position[1]

		if (document.all && !window.XMLHttpRequest) //loose check for IE6 and below

			posoptions.width=$target.width() //IE6- seems to require an explicit width on a DIV

		$target.css(posoptions)

		if (!fixedsupport){

			this.keepfixed($target, settings)

			var evtstr='scroll.' + settings.targetid + ' resize.'+settings.targetid

			jQuery(window).bind(evtstr, function(){alwaysOnTop.keepfixed($target, settings)})

		}

		this.revealdiv($target, settings, fixedsupport)

		if (settings.hideafter>0){ //if hide timer enabled

			setTimeout(function(){

				alwaysOnTop.hidediv(settings.targetid)

			}, settings.hideafter+settings.fadeduration[0])

		}

	},



	keepfixed:function($target, settings){

		var $window=jQuery(window)

		var is1or3=/^[13]$/.test(settings.orientation)

		var is1or2=/^[12]$/.test(settings.orientation)

		var x=$window.scrollLeft() + (is1or3? settings.position[0] : $window.width()-$target.outerWidth()-settings.position[0])

		var y=$window.scrollTop() + (is1or2? settings.position[1] : $window.height()-$target.outerHeight()-settings.position[1])

		$target.css({left:x+'px', top:y+'px'})

	},



	revealdiv:function($target, settings){

		if (settings.fadeduration[0]>0) //if fade in

			$target.show().animate({opacity:1}, settings.fadeduration[0])

		else

			$target.show()

		if (settings.frequency=="session") //set session only cookie (name: 'sots' + targetid)? 

			this.setCookie('sots'+settings.targetid, 'shown')

		else if (/^\d+ day/i.test(settings.frequency)){ //set persistent cookie (name: 'sotp' + targetid)? 

			var persistdays=parseInt(settings.frequency)

			this.setCookie('sotp'+settings.targetid, persistdays, persistdays)

		}

	},



	hidediv:function(targetid){ //public function

		var $target=jQuery('#'+targetid)

		if ($target.css('display')=='none') //if target hidden already

			return

		var settings=this.settingscache[targetid]

		if (settings.fadeduration[1]>0) //if fade out

			$target.animate({opacity:0}, settings.fadeduration[1], function(){$target.hide()})

		else

			$target.hide()

		var evtstr='scroll.' + settings.targetid + ' resize.'+settings.targetid

		jQuery(window).unbind(evtstr)

	},



	loadajaxcontent:function($, settings){

		$.ajax({

			url: settings.externalsource,

			error:function(ajaxrequest){

				alert('Error fetching Ajax content.\nServer Response: '+ajaxrequest.responseText)

			},

			success:function(content){

				var $target=$(content)

				if ($target.get(0).id==settings.targetid)

					alwaysOnTop.positiontarget($target.appendTo('body'), settings)

				else

					alert('Error: The value you have entered for "targetid" ('+settings.targetid+') '

						+ 'doesn\'t match the ID of your remote content\'s DIV container ('+$target.get(0).id+'). This must be corrected'

					)

			}

		})

	},



	init:function(options){

		var settings={}

  	settings=jQuery.extend(settings, this.dsettings, options)

		this.settingscache[settings.targetid]=settings

		if (typeof settings.frequency=="number") //value of 1=show, 0=hide

			settings.display=(settings.frequency>Math.random())? 1 : 0

		else if (settings.frequency=="session")

			settings.display=(this.getCookie('sots'+settings.targetid)=='shown')? 0 : 1 //session cookie name: 'sots' + targetid

		else if (/^\d+ day/i.test(settings.frequency)){ //match 'xx days'

			//If admin has changed number of days to persist from current cookie records, reset persistence by deleting cookie

			if (parseInt(this.getCookie('sotp'+settings.targetid))!= parseInt(settings.frequency))

				this.setCookie('sotp'+settings.targetid, '', -1)

			settings.display=(this.getCookie('sotp'+settings.targetid)!=null)? 0 : 1 //persistent cookie name: 'sotp' + targetid

		}

		jQuery(document).ready(function($){

			if (settings.externalsource!='' && settings.display){ //if ajax content

					alwaysOnTop.loadajaxcontent($, settings)

			}

			else if (settings.externalsource==''){ //inline content

				var $target=$('#'+settings.targetid)

				if (!settings.display){ //if hide content (based on frequency setting)

					$target.hide()

					return false

				}

				else{

					alwaysOnTop.positiontarget($target, settings)

				}

			}

		}) //end ready

	},



	getCookie:function(Name){ 

		var re=new RegExp(Name+"=[^;]*", "i"); //construct RE to search for target name/value pair

		if (document.cookie.match(re)) //if cookie found

			return document.cookie.match(re)[0].split("=")[1] //return its value

		return null

	},



	setCookie:function(name, value, days){

		if (typeof days!="undefined"){ //if set persistent cookie

			var expireDate = new Date()

			var expstring=expireDate.setDate(expireDate.getDate()+days)

			document.cookie = name+"="+value+"; expires="+expireDate.toGMTString()

		}

		else

			document.cookie = name+"="+value+"; path=/"

	}

}