var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1)
					return data[i].identity;
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{
			string: navigator.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari",
			versionSearch: "Version"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			   string: navigator.userAgent,
			   subString: "iPhone",
			   identity: "iPhone/iPod"
	    },
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();


function getScrollXY() {
  var scrOfX = 0, scrOfY = 0;
  if( typeof( window.pageYOffset ) == 'number' ) {
    //Netscape compliant
    scrOfY = window.pageYOffset;
    scrOfX = window.pageXOffset;
  } else if( document.body && ( document.body.scrollLeft || document.body.scrollTop ) ) {
    //DOM compliant
    scrOfY = document.body.scrollTop;
    scrOfX = document.body.scrollLeft;
  } else if( document.documentElement && ( document.documentElement.scrollLeft || document.documentElement.scrollTop ) ) {
    //IE6 standards compliant mode
    scrOfY = document.documentElement.scrollTop;
    scrOfX = document.documentElement.scrollLeft;
  }
  return [ scrOfX, scrOfY ];
}

var menuScrollTimer;

$(document).ready(function(){

	$("#login_, #psw_").addClass('empty');

	$("#login_").focus(function(){
		$(this).removeClass('empty');
	}).blur(function(){
		if($(this).val()=="") $(this).addClass('empty');
	});
	$("#psw_").focus(function(){
		$(this).removeClass('empty');
	}).blur(function(){
		if($(this).val()=="") $(this).addClass('empty');
	});

	
	$(window).scroll(function(){
		if(menuScrollTimer != 'undefined')
		{
			clearTimeout(menuScrollTimer);
		}
		menuScrollTimer = setTimeout(scrollMenu, 200);

	});

	$('#login_').focus();
	$('#login_').blur();

});

function scrollMenu()
{
	var scrollXY = getScrollXY();
	var initialTopMargin = 71;
	var height = $('#side_navigation').height() + initialTopMargin;
	var headerHeight = $('#login_box').height()
		+ parseInt($('#login_box').css('padding-top'))
		+ parseInt($('#login_box').css('padding-bottom'))
		+ $('#header').height();// - 50;
	var bottomLimit = $('#footer').get(0).offsetTop;
	var menuTop;

//	if(BrowserDetect.browser == 'Opera' && BrowserDetect.version < 10)
//	{
//		menuTop = document.documentElement.scrollTop;
//	}
//	else
//	{
//		menuTop = document.documentElement.scrollTop;
//	}

	menuTop = scrollXY[1];

	if(menuTop > bottomLimit - height - 220)
	{
		menuTop = bottomLimit - height - 220;
	}

	if(menuTop < headerHeight)
	{
		menuTop = headerHeight;
	}

//	$('#test').text(menuTop);
	menuTop = menuTop - headerHeight + initialTopMargin ;
	$('#side_navigation').animate({marginTop: menuTop}, 'normal');

}