if(navigator.userAgent.indexOf('MSIE 6.0;') !=-1) {
document.write("<link type='text/css' rel='stylesheet' href='styleIE6.css' />")

}
else if(navigator.userAgent.indexOf('MSIE 5.5;') !=-1 || 
navigator.userAgent.indexOf('MSIE 5.01;') !=-1){
document.write("<link type='text/css' rel='stylesheet' href='styleIE55.css' />")

}
else if(navigator.userAgent.indexOf('MSIE 8.0;') !=-1){
document.write("<link type='text/css' rel='stylesheet' href='style.css' />")

}
else if(navigator.userAgent.indexOf('MSIE 7.0;') !=-1){
document.write("<link type='text/css' rel='stylesheet' href='styleIE7.css' />")

}
else{
document.write("<link type='text/css' rel='stylesheet' href='style.css' />")

}