I'm trying to figure out how to display a textbox when the blank option is selected. Any help or suggestions would be appreciated.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>test</title> <style type="text/css" media="screen"> .hide{ display:none; } </style> </head> <body> <form name="frm1" method="POST" action=""> <p>Select type of exception:<br /> <div id="tabs"> <div id="nav"> Waiver:<input type="radio" name="tab" value="pickfrom" class="div5" />  </div>  <div id="div5" class="tab"><br /> <label>Reason for Waiver</label> <select name="selWaiver" id="waivers" onchange="if(this.selected index==blank){this.form['box'].style.visibility='visible'}else{this.form['box'].style.visibility='hidden'};">  <option value="reason">Reason</option> <option value="newReason">New Reason</option> <option value="blank">Blank</option> </select>    </div>  </div> <script type="text/javascript" charset="utf-8"> (function(){ var tabs =document.getElementById('tabs'); var nav = tabs.getElementsByTagName('input'); /* * Hide all tabs */ function hideTabs(){ var tab = tabs.getElementsByTagName('div'); for(var i=0;i<=nav.length;i++){ if(tab[i].className == 'tab'){ tab[i].className = tab[i].className + ' hide'; } } } /* * Show the clicked tab */ function showTab(tab){ document.getElementById(tab).className = 'tab' } hideTabs(); /* hide tabs on load */ /* * Add click events */ for(var i=0;i<nav.length;i++){ nav[i].onclick = function(){ hideTabs(); showTab(this.className); } } })(); </script> </form> </body> </html>