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

Posted on 2009-04-02
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4,682 Views
Last Modified: 2013-12-08
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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Question by:ttomaszewicz
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5 Comments
 
LVL 30

Expert Comment

by:third
ID: 24058112
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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LVL 30

Expert Comment

by:third
ID: 24058128
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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Author Comment

by:ttomaszewicz
ID: 24059216
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
 
LVL 30

Accepted Solution

by:
third earned 100 total points
ID: 24060328
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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Author Closing Comment

by:ttomaszewicz
ID: 31565963
This is what I needed. Thank you for your help.
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