/*************************************************
* atsutil.js                                     *
*                                                *
* Utility routines to support aircraft-tool.com  *
*************************************************/

var isCSS = false;
var isW3C = false;
var isIE4 = false;
var isNN4 = false;
var isIE6 = false;
var isGecko = false;
var isOpera = false;
var isDHTML = false;

function autoconfig()
{
	if( document && document.images )
	{
		isCSS = (document.body && document.body.style) ? true : false;
		isW3C = (isCSS && document.getElementById) ? true : false;
		isIE4 = (isCSS && document.all && readIEVer() >= 4.0) ? true : false;
		isNN4 = (document.layers) ? true : false;
		isGecko = (isCSS && navigator && navigator.product && navigator.product == "Gecko");
		isOpera = (isCSS && navigator.userAgent.indexOf( "Opera") != -1 );
		isIE6CSS = (document.compatMode && document.compatMode.indexOf("CSS1") >= 0) ? true : false;
		isIE6 = ( isIE6CSS && readIEVer() >= 6.0 );
		isDHTML = isCSS && ( isIE4 || isGecko || isOpera );

		if( isOpera && readOperaVer() < 7 )
		{
			isDHTML = false;
		}
		else if( isGecko && navigator.productSub <= 20011022 )
		{
			isDHTML = false;
		}
		else if( isGecko && navigator.productSub == 20030107 )
		{
			var x = navigator.userAgent.indexOf( "AppleWebKit" );
			if( x > -1 )
			{
				isDHTML = ( navigator.userAgent.substring( x + 12, x + 15 ) ) > 300;
			}
			else
			{
				isDHTML = false;
			}
		}
	}
}


function readIEVer()
{
	var agent = navigator.userAgent;
	var offset = agent.indexOf( "MSIE" );
	if( offset < 0 )
	{
		return 0;
	}
	return parseFloat( agent.substring( offset + 5, agent.indexOf( ";", offset ) ) );
}


function readOperaVer()
{
	var agent = navigator.userAgent;
	var offset = agent.indexOf( "Opera" );
	if( offset < 0 )
	{
		return 0;
	}
	return parseFloat( agent.substring( offset + 6 ) );
}


function openWin(url,width,height){ 
 window.open(url,'','width=' + width + ',height=' + height + ',scrollbars=yes,resizable=yes,toolbar=no,alwaysRaised=yes');
}