setInputValue = function(inputElement, inputValue) {
    logDebug('Entering setInputValue. setting', inputElement.id, 'to', inputValue);
    if (inputElement.tagName == 'INPUT' || inputElement.tagName == 'TEXTAREA') {
        inputElement.value = inputValue; 
    }
    else if (inputElement.tagName == 'SELECT') {
        for (var i=0; i<inputElement.options.length; i++) {
            if (inputElement.options[i].value == inputValue) {
                inputElement.options[i].selected = true;
            };
        };
    }
    else {
        logError('Unknown input tag: ' + inputElement.tagName);
    };
};

getInputValue = function(inputElement) {
    var inputValue = null;
    if (inputElement.tagName == 'INPUT' || inputElement.tagName == 'TEXTAREA') {
        inputValue = inputElement.value;
    }
    else if (inputElement.tagName == 'SELECT') {
        if (inputElement.selectedIndex != -1) {
            inputValue = inputElement.options[inputElement.selectedIndex].value;
        };
    }
    else {
        logError('Unknown input tag: ' + inputElement.tagName);
    };
    return inputValue;
};


optionBuilder = function(option) {
    logDebug("Entering optionBuilder:", option.value, option.label);
    return OPTION({value: option.value}, option.label);
};


buildOptionsFor = function(selectedAttr, relatedAttr) {

    logDebug("Entering buildOptionsFor:", 
        "selectedAttr", selectedAttr, 
        "relatedAttr", relatedAttr);

    var result = [];

    var selectedValue = getInputValue(getSelectElementFor(selectedAttr));
    var relatedValues = productAttributes[relatedAttr].values;

    for (var i=0; i<relatedValues.length; i++) {
        logDebug(i, "selectedValue", selectedValue, 
                    "relatedValue", relatedValues[i].value);
        var optionValue = selectedValue+","+relatedValues[i].value;
        optionValue = optionValue.split(",").sort()
        if(optionValue in availableOptionValues) {
            result.push(relatedValues[i]);
        };
    };
    return result;
};


getSelectElementFor = function(productAttr) {
    return getElement("attribute_"+productAttr);
};


updateOptionsRelatedTo = function(selectedAttr) {
    logDebug("Entering updateOptionsRelatedTo",
        "selectedAttr", selectedAttr);
    var relatedAttrs = [];
    for (var productAttr in productAttributes) {
        if (productAttr != selectedAttr) {
            relatedAttrs.push(productAttr);
        };
    };
    logDebug("relatedAttrs", repr(relatedAttrs));

    for (var i=0; i<relatedAttrs.length; i++) {
        var oldSelectElement = getSelectElementFor(relatedAttrs[i]);
        logDebug("building newSelectElement for", relatedAttrs[i]);
        var newSelectElement = 
            SELECT({
                id: oldSelectElement.id, 
                name: oldSelectElement.name, 
                onchange: oldSelectElement.onchange 
                }, 
                map(optionBuilder, buildOptionsFor(selectedAttr, relatedAttrs[i])));
        if (getInputValue(oldSelectElement)) {
            setInputValue(newSelectElement, getInputValue(oldSelectElement));
        };
        swapDOM(oldSelectElement, newSelectElement);
    };
};

function isAvailable(selected_value_ids)
{
	var available = false;
	var elements = document.valueIdList.elements;
	for (var i = 0; i < elements.length; i++)
	{
		var element = elements[i];
		var available_value_ids = element.value.split(',');
		selected_value_ids.sort();
		available_value_ids.sort();

		if (selected_value_ids.toString() ==
	        available_value_ids.toString())
		{
			available = true;
			break;
		};
	};
	return available;
};

function verifyStockStatus()
{
	var selected_value_ids = [];
	var elements = document.productForm.elements;
	for (var i = 0; i < elements.length; i++)
	{
		var element = elements[i];
		if(element.name.indexOf('attribute_') != -1)
		{
			var value_id = element.value;
			var options = element.options;
			for(var j = 0; j < options.length; j++)
			{
				if (options[j].selected)
				{
					selected_value_ids.push(value_id);
				};
			}
		};

	};

	var isInStock = isAvailable(selected_value_ids);
	if(!isInStock)
	{
		alert("Unfortunately, this style is currently unavailable in the color/size combination you have chosen.  Please choose another combination for this style, or email us for future availability of this combination or other similar style suggestions.  We appreciate your business and look forward to helping you find the outfit you desire.");
	};

	return isInStock; // returning 'false' cancels productForm submission
};