//Detect IE5.5+
version=0
if (navigator.appVersion.indexOf("MSIE")!=-1){
temp=navigator.appVersion.split("MSIE")
version=parseFloat(temp[1])
}

if (version>=5.5) //NON IE browser will return 0
document.write('<style> #textarea {height: 560px;} </style>');

else 
  document.write('');
 
//end detection