var agt = navigator.userAgent.toLowerCase();
var ver = parseInt(navigator.appVersion);
var is_nav = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
  && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1) 
  && (agt.indexOf('webtv')==-1));
var is_nav6 = agt.indexOf('gecko')!=-1;
var is_opera = agt.indexOf('opera') != -1; 
var is_ie   = (agt.indexOf("msie") != -1); 
	
if(is_opera){
  document.write('<link href="/youthcrime/styles/opera.css" rel="stylesheet" type="text/css">');
} else if (is_nav6) {
  document.write('<link href="/youthcrime/styles/nav6.css" rel="stylesheet" type="text/css">');
} else if(is_ie){
  document.write('<link href="/youthcrime/styles/ie.css" rel="stylesheet" type="text/css">');
} else {
  document.write('<link href="/youthcrime/styles/basic.css" rel="stylesheet" type="text/css">');
}