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<select> <option> does not accept style.display='none' under IE. Any Workaround?

Following demo code works fine for Firefox. IE6 ignores the update of style.display property.
Would you please help me?

the example code should allow the last option be selected only for the first attempt. Next time the option should be disabled.

n.b. also
document.getElementById("test").options[2].disabled=true
does not work in IE, while is OK with Firefox.
<H2>demo</h2>
<form>
<select id='test' name='test' onChange='document.getElementById("test").options[2].style.display="none"' >
<option id='test1' value='test1'>---test1---</option>
<option id='test2' value='test2'>---test2---</option>
<option id='test3' value='test3'>---test3---</option>
</select>
other inputs
</form>

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ttomaszewicz
Asked:
ttomaszewicz
  • 3
  • 2
1 Solution
 
thirdCommented:
below is my suggested workaround using a global js variable.
<!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>
<title>Third Santor</title>
<script type="text/javascript">
var flag = false;
function disableOption2(obj){
  if(flag){    
    obj.options[2] = null;
  }
  flag = true;
}
</script>
</head>
<body>
<H2>demo</h2>
<form>
<select id='test' name='test' onChange='disableOption2(this);' >
<option id='test1' value='test1'>---test1---</option>
<option id='test2' value='test2'>---test2---</option>
<option id='test3' value='test3'>---test3---</option>
</select>
<input type="button" value="Click" onclick="alert(this.form.test.value)" />
other inputs
</form>
</body>
</html>

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0
 
thirdCommented:
i added one line checking. update the script to
<script type="text/javascript">
var flag = false;
function disableOption2(obj){
  if(flag){    
    if(obj.options.length==3){
      obj.options[2] = null;
	}
  }
  flag = true;
}
</script>

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0
 
ttomaszewiczAuthor Commented:
This works! Thanks!
Is there a way to revert the last option - to be visible and selectable again? e.g. after pressing a button?
0
 
thirdCommented:
sure here,
<!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>
<title>Third Santor</title>
<script type="text/javascript">
var flag = false;
function disableOption2(obj){
  if(flag){    
    if(obj.options.length==3){
      obj.options[2] = null;
        }
  }
  flag = true;
}
 
function restoreLastOption(obj){
  if(obj.options.length==2){
    obj.options[2] = new Option('---test3---', 'test3');
	flag = false;
  }
}
</script>
</head>
<body>
<H2>demo</h2>
<form>
<select id='test' name='test' onChange='disableOption2(this);' >
<option id='test1' value='test1'>---test1---</option>
<option id='test2' value='test2'>---test2---</option>
<option id='test3' value='test3'>---test3---</option>
</select>
<input type="button" value="Click" onclick="alert(this.form.test.value)" />
<input type="button" value="Restore 3rd Option" onclick="restoreLastOption(this.form.test);" />
other inputs
</form>
</body>
</html>

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0
 
ttomaszewiczAuthor Commented:
This is what I needed. Thank you for your help.
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