//discriminacion de css
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"
		},
		{
			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();

var navegador=BrowserDetect.browser;
var versionnav=BrowserDetect.version;
//alert(navegador + " " + versionnav);
if (navegador=="Safari")
{
	document.write("<link href='css/safari.css' rel='stylesheet' type='text/css' />");
}
else if (navegador=="Chrome")
{
	document.write("<link href='css/chrome.css' rel='stylesheet' type='text/css' />");
}
else if (navegador=="Firefox")
{
	document.write("<link href='css/ns.css' rel='stylesheet' type='text/css' />");
}
else if (navegador=="Explorer")
{
	if (versionnav==8)
	{
		document.write("<link href='css/ie8.css' rel='stylesheet' type='text/css' />");
	}
	else if (versionnav==7)
	{
		document.write("<link href='css/ie7.css' rel='stylesheet' type='text/css' />");
	}
	else
	{
		document.write("<link href='css/ie.css' rel='stylesheet' type='text/css' />");
	}
}
else
{
	document.write("<link href='css/ns.css' rel='stylesheet' type='text/css' />");
}



function cambiaImagen (fuente,id)
{
    document.images[id].src = fuente;
}

function valida()
{
	var f=document.contactar;
	if (f.nombre.value=="")
	{
		alert("Debes indicarnos tu nombre para que podamos atenderte de forma personalizada");
		f.nombre.focus();
	}
	else if (f.mail.value=="" && f.telefono.value=="")
	{
		alert("Debes indicarnos una dirección de correo a la que poder contestarte o un teléfono al que poder llamarte");
		f.mail.focus();
	}
	else if (f.asunto.value=="")
	{
		alert("Indicanos, por favor, el asunto de tu consulta para poder trasladársela a la persona adecuada desde el primer momento");
		f.asunto.focus();
	}
	else
	{
		f.submit();
	}
}