Hi all,
I've got a script that I found on these forums that gives a text-box to a set of radio options. It's essentially an 'other___' box.

It works great, however, my php contains a loop where the strip of radio options would appear multiple times on one page. Not knowing too much javascript, I was hoping someone could help me generalize this JS so it can exist in multiple instances on the page.

JS
Code:
        function displayTextBox()
        {
            var objElement = document.getElementById('otherTextBox');
			otherTextBox.style.display = 'block';
			otherTextBox.style.visibility = 'visible';
        }
		
		function hideTextBox()
		{
			var objElement = document.getElementById('otherTextBox');
			otherTextBox.style.display = 'none';
			otherTextBox.style.visibility = 'hidden';
		}
        
		function validate()
		{
			var arrElements = document.getElementsByName('choice');
			var objElement;
			var boolContinue = false;
			var objOtherText;
			
			for(var i=0, _length=arrElements.length; i<_length; i++)
			{
				objElement = arrElements[i];
				
				if(objElement.checked)
				{
					if(objElement.id == 'choice5')
					{
						objOtherText = document.getElementById('othertext');
						
						if(strTrim(objOtherText.value).length>0)
						{
							boolContinue = true;
							break;
						}
					}
					else
					{
						boolContinue = true;
						break;
					}
				}
			}
			
			if(boolContinue)
			{
				alert('Continue, user completed the information.')
			}
			else
			{
				alert('Ask user to complete the data.')
			}
		}
		
		/**
		 * Removes all white space characters from the string.
		 * 
		 * @param: {String} String to trim.
		 * 
		 * @return {String} Trimed string.
		*/
		function strTrim(strTrim) 
		{
			return strTrim.replace(/^\s+|\s+$/g, '');
		}
The HTML that is being looped in PHP
HTML Code:
<form name='' class='form' action='js/submit.php' method='post'>
<label for='choice1'>Keep:</label>
<input type='radio' name='dec[]' id='choice1' value='keep' onclick='hideTextBox()'>
<label for='choice2'>Donate:</label>
<input type='radio' name='dec[]' id='choice2' value='donate' onclick='hideTextBox()'>
<label for='choice3'>Sell:</label>
<input type='radio' name='dec[]' id='choice3' value='sell' onclick='hideTextBox()'>
<label for='choice4'>Trash:</label>
<input type='radio' name='dec[]' id='choice4' value='trash' onclick='hideTextBox()'>
<label for='choice5'>Give To:</label>
<input type='radio' name='dec[]' id='choice5' value="" onclick='displayTextBox()' />
<div id='otherTextBox' style='display:none;visibility:hidden;'>
<textarea id='othertext' cols='15' rows='1' style='resize:none;' name='dec[]'></textarea>
</div>
<input type='hidden' name='id' value='<?= $row['Id'] ?>' /><br />
<input type='submit' value='Submit' onclick='validate()'>
</form>