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 ShowLayer( id, action, action2 )
{
	switch( BrowserDetect.browser ) {
	case 'Explorer' :
		eval("document.all." + id + ".style.display = '" + action2 + "'");
		break;
	case 'Firefox' :
		if( action == 'visible' && document.getElementById(id).style.display == 'none' )
			eval("document.getElementById('" + id + "').style.display = 'inline'");			
		eval("document.getElementById('" + id + "').style.visibility = '" + action + "'");
		break;
	default: 
		eval("document." + id + ".style.visibility='" + action + "'");
		break;
	}
}
function mytabon(tabid, b1, b2, b3, b4) {
    ShowLayer(b2, 'collapse', 'None');
    ShowLayer(b3, 'collapse', 'None');
    ShowLayer(b4, 'collapse', 'None');
    ShowLayer(b1, 'visible', 'inline');

    document.getElementById(tabid).className = 'tabcontrolOn';
    if (tabid != 'tab1') { document.getElementById('tab1').className = 'tabcontrol'; }
    if (tabid != 'tab2') { document.getElementById('tab2').className = 'tabcontrol'; }
    if (tabid != 'tab3') { document.getElementById('tab3').className = 'tabcontrol'; }
    if (tabid != 'tab4') { document.getElementById('tab4').className = 'tabcontrol'; }

}