Use of Arrays with <CF_TwoSelectsRelated>

You cannot use an array here because the Name1 and Name2 are query columns.  So I am not sure what you are trying to do.

If you want to write the tag on your own you can.  It would be like this (example for selecting a person - Buyer -  based on a department) :

<script type="text/javascript" language="JavaScript">
<!--
/* Dynamically populate Buyer select box based on seleted DepartmentID */
// Create an array to hold Buyers
var BuyerArray = new Array;

// Define a custom Javascript object type to represent a single Buyer
function Buyer(BuyerUsername, DepartmentID, BuyerName)
{
      this.BuyerUsername = BuyerUsername;
      this.DepartmentID = DepartmentID;
      this.BuyerName = BuyerName;
}
<!--- For each Buyer, append a new Buyer object to the array of Buyers --->
<cfoutput query="GetBuyers">
      BuyerArray[BuyerArray.length] = new Buyer("#JSStringFormat(Username)#", "#JSStringFormat(DepartmentID)#", "#JSStringFormat(BuyerName)#");
</cfoutput>

/* Fill the Buyer select box based on the DepartmentID */
function fillBuyers()
{
      // Stop if there is no selected ParentID
      if (document.AddIssue.DepartmentID.selectedIndex == -1)
      {
            return;
      }
      
      var DepartmentID = document.AddIssue.DepartmentID.options[document.AddIssue.DepartmentID.selectedIndex].value;
      
      // Remove all options in the Buyer select box
      document.AddIssue.Buyer.options.length = 0;
      
      // For each item in the Buyer array ...
      for (var i = 0; i < BuyerArray.length; i++)
      {
            // If the Buyer's DepartmentID is the same as the currently selected DepartmentID
            if (BuyerArray[i].DepartmentID == DepartmentID)
            {
                  // Put a new option in the Buyer select box
                  document.AddIssue.Buyer.options[document.AddIssue.Buyer.options.length] = new Option(BuyerArray[i].BuyerName, BuyerArray[i].BuyerUsername);
            }
      }
}
-->
</script>


<select name="DepartmentID" onChange="fillBuyers()" style="width: 200px;">
      <option value=""></option>
      <option value="GM">General Merchandise</option>
      <option value="TR">Trade</option>
      <option value="TX">Text</option>
</select>

<select name="Buyer" style="width: 200px;"></select>

According to the documentation for the custom tag, <CF_TwoSelectsRelated>:  "NAME1 and NAME2 are the names of the two SELECT list elements to be included on the form. The SELECT element with NAME1 will appear first on the page, and the one with NAME2 will be second. For instance, if you use NAME2="Selection", then whatever the user chooses in the second SELECT will be available to for your use as #Form.Selection# in the next template."  [NOTE: there is no mention that these elements are or must be query column names.]

I am creating a form with multiple lines, and would like to capture these multiple lines of data in an array.  So I want to create a loop where I repeatedly invoke the <CF_TwoSelectsRelated> tag.  And I want to capture the users choices (from multiple boxes) in an array (Selection[1], Selection[2] rather than in multiple single variables (Selection1, Selection2).  I am not proficient in javascript, so I didn't understand the solution that was recommended.