var _selectedImage = new Array();

function swc_selectedImage(group, control, browser, version, supportTransparentPNG) {
    this._group = group;
    this._control = control;
    this._browser = browser;
    this._version = version;
    this._supportTransparentPNG = supportTransparentPNG;
}

function swc_setSelectedImage(group, control, browser, version, supportTransparentPNG)
{
    var found = false;
    
    if ( _selectedImage != null )
    {
        for(var i = 0; i <= _selectedImage.length; ++i )
        {
            obj = _selectedImage[i];
        
            if ( obj != null && obj._group == group )
            {
                found = true;
                obj._control = control;
                break;
            } 
        }
    }
    
    if ( found == false )
    {
        var image = new swc_selectedImage(group, control, browser, version, supportTransparentPNG);
        
        _selectedImage.push(image);
    }
}

function swc_getSelectedImage(group)
{
    var selectedImage = null;
    
    if ( _selectedImage != null )
    {      
        for(var i = 0; i <= _selectedImage.length; ++i )
        {
            obj = _selectedImage[i];         
            
            if ( obj != null && obj._group == group )
            {
                selectedImage = obj;
                break;
            } 
        }
    }
    
    return selectedImage;
}

function swc_swapMouseOver(id, browser, version, supportTransparentPNG)
{
    var control = swc_getById(id);
    var style = control.getAttribute('buttonstyle');
    
    if ( control != null && style != "Toggle")
    {
	    var image = control.getAttribute('imageurlmouseover');
	
	    swc_swapImage(id, image, browser, version, supportTransparentPNG);
	}
}

function swc_swapMouseOut(id, browser, version, supportTransparentPNG)
{
    var image = null;
    
    var control = swc_getById(id);
    
    if ( control != null )
    {    
        style = control.getAttribute('buttonstyle');
        state = control.getAttribute('buttonstate');
        groupname = control.getAttribute('groupname');
    
        if ( style != "Toggle" )
        {
	        image = control.getAttribute('imageurlmouseout');
            swc_swapImage(id, image, browser, supportTransparentPNG);	        
	    }		    
	}
}

function swc_swapMouseDown(id, browser, version, supportTransparentPNG)
{
	var image = null;

    var control = swc_getById(id);
    
    if ( control != null )
    {    
        image = control.getAttribute('imageurlmousedown');
        style = control.getAttribute('buttonstyle');
        state = control.getAttribute('buttonstate');
        groupname = control.getAttribute('groupname');
    
        if ( style == "Toggle" )
        {
            // first, lets get the old selected object if it exists.            
            var previousImage = swc_getSelectedImage(groupname);
            if ( previousImage != null )
            {
                if ( previousImage._control != control.getAttribute('id') )
                {
                    var previousControl = swc_getById(previousImage._control);
                    if ( previousControl != null )
                    {
                        previousControl.setAttribute('buttonstate', 'NotSelected');
                        imageOut = control.getAttribute('imageurlmouseout');
                        swc_swapImage(previousImage._control, imageOut, previousImage._browser, previousImage._version, previousImage._supportTransparentPNG);
                    }
                }
            }
            
            if ( state == "Selected" )
            {
                control.setAttribute('buttonstate', 'NotSelected');
                
                image = control.getAttribute('imageurlmouseout');                
            }
            else
            {
                control.setAttribute('buttonstate', 'Selected');                                             
            }                        
        }	
        else
        {
	        control.setAttribute('buttonstate', 'Selected');
	    }
		
	    swc_swapImage(id, image, browser, version, supportTransparentPNG);
        swc_setSelectedImage(groupname, id, browser, version, supportTransparentPNG);                   	    
	}
}

function swc_swapImage(id, image, browser, version, supportTransparentPNG)
{    
	if ( supportTransparentPNG == "true" )
	{
	    var control = swc_getById(id);
	    if ( control != null )
	        control.filters(0).src = image;
	}
	else
	{	
	    var control = swc_getById(id);
	    if ( control != null )
	        control.setAttribute('src', image);
	}
}

function swc_navigateToUrl(url)
{
    window.location.href = url;
}