// JavaScript Document
<!--
var browser     = '';
var version     = '';
var entrance    = '';
var cond        = '';
// BROWSER?
if (navigator.userAgent.toLowerCase().indexOf('msie')!=-1)
browser = 'IE';
else if (navigator.userAgent.toLowerCase().indexOf('firefox')!=-1)
browser = 'FF';
else if (navigator.userAgent.toLowerCase().indexOf('chrome')!=-1)
browser= 'CR';
else if (navigator.userAgent.toLowerCase().indexOf('safari')!=-1)
browser= 'SF';
else if (navigator.userAgent.toLowerCase().indexOf('opera')!=-1)
browser= 'OP';

var head = document.getElementsByTagName("head")[0];
var css = document.createElement('link');
css.type = 'text/css';
css.rel = 'stylesheet';
if (version == ""){
version= navigator.appVersion;
paren = version.indexOf("MSIE");
if (paren== -1)
   version=0;
else
 {whole_version =version.substring(paren + 5, version.indexOf(";",paren));
 version   = parseFloat(whole_version);}
}

switch (browser)
{
  case 'IE': if (version >= 7) css.href = '';else css.href = 'styles/estilos_ie6.css';break;
  case 'OP': css.href = 'styles/estilos_opera.css';break;
  case 'CR': css.href = 'styles/estilos_chrome.css';break;
  case 'FF': css.href = 'styles/estilos_firefox.css';break;
  case 'SF': css.href = 'styles/estilos_safari.css';break;
}
css.media = 'screen';
head.appendChild(css);

// -->
<!--
function MM_goToURL() { //v3.0
  var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
  for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}
//-->