var xmlhttp;

function checkReadyState(obj)
{
  if(obj.readyState == 4)
  {
    if(obj.status == 200)
    {
      return true;
    }
    else
    {
//      alert("Problem retrieving XML data");
	  return true;
    }
  }
}

function initObj() {
	xmlhttp = null;
	if (window.XMLHttpRequest)
	  {
	  xmlhttp=new XMLHttpRequest();
	  }
	// code for IE
	else if (window.ActiveXObject)
	  {
	  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	  }
	if (xmlhttp!=null)
	  {
		;
	  }
	else
	  {
	  alert("Your browser does not support XMLHTTP.");
	  }
}


function getQueryVariable(variable) {
  var query = window.location.search.substring(1);
  var vars = query.split("&");
  for (var i=0;i<vars.length;i++) {
    var pair = vars[i].split("=");
    if (pair[0] == variable) {
      return pair[1];
    }
  } 
  return "";
}

function findPosX(obj)
  {
	 try
	 {
		var curleft = 0;
		if(obj.offsetParent)
			while(1) 
			{
			  curleft += obj.offsetLeft;
			  if(!obj.offsetParent)
				break;
			  obj = obj.offsetParent;
			}
		else if(obj.x)
			curleft += obj.x;
		return curleft;
	 }
	 catch (e)
	 {
		 return 0;
	 }
  }

  function findPosY(obj)
  {
	 try {
		var curtop = 0;
		if(obj.offsetParent)
			while(1)
			{
			  curtop += obj.offsetTop;
			  if(!obj.offsetParent)
				break;
			  obj = obj.offsetParent;
			}
		else if(obj.y)
			curtop += obj.y;
		return curtop;
	 } 
	 catch (e) {
		return 0;
	 }
  }


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: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			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.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};
BrowserDetect.init();

function getScrollLength(orientation) {
	if (BrowserDetect.browser == "Explorer" || BrowserDetect.browser == "Firefox")
	{
		if (orientation == "top") return document.documentElement.scrollTop;
		if (orientation == "left") return document.documentElement.scrollLeft;
	} else {
		if (orientation == "top") return document.body.scrollTop;
		if (orientation == "left") return document.body.scrollLeft;
	}
}

function getMouseX(e) {
	var posx = 0;
	if (!e) var e = window.event;
	if (e.pageX || e.pageY) 	{
		posx = e.pageX;
	}
	else if (e.clientX || e.clientY) 	{
		posx = e.clientX + document.body.scrollLeft+ document.documentElement.scrollLeft;
	}
	return posx;
}

function getMouseY(e) {
	var posy = 0;
	if (!e) var e = window.event;
	if (e.pageY) 	{
		posy = e.pageY;
	}
	else if (e.clientY) 	{
		posy = e.clientY + document.body.scrollTop + document.documentElement.scrollTop;
	}
	return posy;
}

function getCenter(objwidth, objheight) {
	posy=getScrollLength("top") + (document.documentElement.clientHeight - objheight) / 2 ;
	posx=getScrollLength("left") + (document.documentElement.clientWidth -objwidth)/2 ;
	return {x:posx, y:posy};
}

function getXMLNode(x) {
	if (BrowserDetect.browser == "Firefox") {
		return x[0].textContent;
	} else {
		return x[0].firstChild.data;
	}

}

function getWindowWidth() {
	return getScrollLength("left") + document.documentElement.clientWidth;
}

function getWindowHeight() {
	return getScrollLength("top") + document.documentElement.clientHeight;
}