ua = 0;
if(navigator.userAgent.indexOf("Opera") >= 0){
ua = 2;
}
else if( (navigator.userAgent.indexOf("MSIE 6.") >= 0)
&&(navigator.userAgent.indexOf("Windows") >= 0) ){
ua = 1;
}
else {
ua = 2;
}
if(ua == 1) {
document.write('<link rel="stylesheet" type="text/css" href="style_ie6.css" />');
} else {
document.write('<link rel="stylesheet" type="text/css" href="style.css" />');
}