// selections.js
// functions to move options between two select boxes in a form
// released to the public domain by mredkj 
// http://www.mredkj.com/tutorials/tutorial_mixed2b.html
// last checked 2005-01-24

function addOption(theSel, theText, theValue)
{
        var newOpt = new Option(theText, theValue);
        var selLength = theSel.length;
        theSel.options[selLength] = newOpt;
}

function deleteOption(theSel, theIndex)
{       
        var selLength = theSel.length;
        if(selLength>0)
        {
                theSel.options[theIndex] = null;
        }
}

function moveOptions(theSelFrom, theSelTo)
{
        
        var selLength = theSelFrom.length;
        var selectedText = new Array();
        var selectedValues = new Array();
        var selectedCount = 0;
        
        var i;
        
        // Find the selected Options in reverse order
        // and delete them from the 'from' Select.
        for(i=selLength-1; i>=0; i--)
        {
                if(theSelFrom.options[i].selected)
                {
                        selectedText[selectedCount] = theSelFrom.options[i].text;
                        selectedValues[selectedCount] = theSelFrom.options[i].value;
                        deleteOption(theSelFrom, i);
                        selectedCount++;
                }
        }
        
        // Add the selected text/values in reverse order.
        // This will add the Options to the 'to' Select
        // in the same order as they were in the 'from' Select.
        for(i=selectedCount-1; i>=0; i--)
        {
                addOption(theSelTo, selectedText[i], selectedValues[i]);
                
        }
        
}

function makeArray(theSelFrom, theHiddenTo)
{
    var theArray = new Array();
    for(i=0;i<theSelFrom.length;i++) 
    {
        theArray[i] = theSelFrom.options[i].value;
    }
    theHiddenTo.value = theArray;

}