var bDetect = ( (navigator.userAgent.indexOf("MSIE") >= 0) &&
                   (navigator.appVersion.substring(0,1) >= 4) )
if(bDetect){document.write("<STYLE>.off{display:none}</STYLE>")}

function showSol(proNum){
  if (bDetect){
    if (proNum.className=="off"){

proNum.className="on";
proNum.style.width="550px";
proNum.style.backgroundColor="77ffcc";
proNum.style.padding="3px";
} 
    else{proNum.className="off"}
  }
}