/**
 * Generates a browser-specific Flash tag. Create a new instance, set whatever
 * properties you need, then call either toString() to get the tag as a string, or
 * call write() to write the tag out.
 */

/**
 * Creates a new instance of the FlashTag.
 * src: The path to the SWF file.
 * width: The width of your Flash content.
 * height: the height of your Flash content.
 */
function FlashTag(src, width, height, version)
{
    if (arguments.length <4){
		throw ('FlashTagInstantiationError: A new Flash Tag must be instantiated with src, width, height and version arguments.');
	}
	for (var i=0; i<arguments.length; i++){
		if (arguments[i] == null || arguments[i] == undefined){
			throw ('FlashTagInstantiationError: All FlashTag arguments must be defined values.');
		}
	}
	
	// required parameters
	this.src       = src;
    this.width     = width;
    this.height    = height;
    this.version   = version;
	
    this.id        = null;
    this.flashVarsString = null;
	this.flashVars = null
	this.flashParam = new Object();
}

/**
 * Sets the Flash version used in the Flash tag.
 */
FlashTag.prototype.setVersion = function(v)
{
    this.version = v;
}

/**
 * Sets the ID used in the Flash tag.
 */
FlashTag.prototype.setId = function(id)
{
    this.id = id;
}

/**
 * Specifies the location (URL) of the Flash content to be loaded.
 */
FlashTag.prototype.setSource = function(src) {
    this.src = src; 
}

/**
 * Specifies the width of the Flash content in either pixels or percentage of browser window. 
 */
FlashTag.prototype.setWidth = function(w) {
    this.width = width; 
}

/**
 * Specifies the height of the Flash content in either pixels or percentage of browser window. 
 */
FlashTag.prototype.setHeight = function(h) {
    this.h = height; 
}

/**
 * The required version of the Flash Player for the specified content. 
 */
FlashTag.prototype.setVersion = function(v) {
    this.version = v;
}

/**
 * Sets any variables to be passed into the Flash content. 
 */
FlashTag.prototype.setFlashvarString = function(fvs)
{
    this.flashVarString = fvs;
}

/**
 * Used to send root level variables to the Flash content. You can add as many name/value pairs as
 * you want. The formatting of the Flash vars (turning them into a query string) is handled automatically.
 */
FlashTag.prototype.addFlashVar = function(n, v) {
    if (this.flashVars == null) {
        this.flashVars = new Object();
    }

    this.flashVars[n] = v;
}

/**
 * Used to remove Flash vars. This is primarily useful if you want to reuse an instance of the FlashTag
 * but you don't want to send the same variables to more than one piece of Flash content. 
 */
FlashTag.prototype.removeFlashVar = function(n) {
    if (this.flashVars != null) {
        this.flashVars[n] = undefined;
    }
}

/**
 * (window, opaque, transparent) Sets the Window Mode property of the Flash content for transparency,
 * layering, and positioning in the browser. 
 */
FlashTag.prototype.setWmode = function(wm) {
    if (wm != 'window' && wm != 'opaque' && wm != 'transparent') {
        throw ('UnsupportedFlashTagValue: Supported values are "window", "opaque", and "transparent".');
    }
    this.flashParam['wmode'] = wm;
}

/**
 * (low, high, autolow, autohigh, best) Sets the quality at which the Flash content plays.
 */
FlashTag.prototype.setQuality = function(q) {
    if (q != 'low' && q != 'high' && q != 'autolow' && q != 'autohigh' && q != 'best') {
        throw ('UnsupportedValueException: Supported values are "low", "high", "autolow", "autohigh", and "best".');
    }
    this.flashParam['quality'] = q;
}

/**
* sets script access for the flash tag to allow JS access from Flash
*/

FlashTag.prototype.setScriptAccess = function(sa) {
    if (sa != 'always' && sa != 'never') {
        throw ('UnsupportedFlashTagValue: Supported values are "always" and "never".');
    }
    this.flashParam['allowScriptAccess'] = sa;
}

/**
* sets the background color for the swf
*/

FlashTag.prototype.setBgColor = function(color) {
    if (color.charAt(0) != '#') {
        color = '#' + color;
    }
    this.flashParam['bgcolor'] = color;
}


/**
 * Get the Flash tag as a string. 
 */
FlashTag.prototype.toString = function()
{
    var ie = (navigator.appName.indexOf ("Microsoft") != -1) ? 1 : 0;
    var flashTag = new String();
    if (ie)
    {
        flashTag += '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" ';
        if (this.id != null){
            flashTag += 'id="'+this.id+'" ';
        }
        flashTag += 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version='+this.version+'" ';
        flashTag += 'width="'+this.width+'" ';
        flashTag += 'height="'+this.height+'">';
        flashTag += '<param name="movie" value="'+this.src+'"/>';
        
		for (var n in this.flashParam) {
            if (this.flashParam[n] != undefined && this.flashParam[n] != null){
                flashTag += '<param name="'+n+'" value="'+this.flashParam[n]+'"/>';
            }
        }
		
		if (this.flashVars != null || this.flashVarString != null){
     		var fvs = this.getFlashVarsAsString();
			if (fvs.length >0){
				flashTag += '<param name="flashvars" value="'+this.flashVars+'"/>';
			}
 		}
        flashTag += '</object>';
    }
    else
    {
        flashTag += '<embed src="'+this.src+'" ';
        flashTag += 'width="'+this.width+'" ';
        flashTag += 'height="'+this.height+'" ';
        flashTag += 'type="application/x-shockwave-flash" ';
        if (this.id != null){
            flashTag += 'name="'+this.id+'" ';
        }
		
		for (var n in this.flashParam) {
            if (this.flashParam[n] != undefined && this.flashParam[n] != null){
                flashTag += (' '+n+'="'+this.flashParam[n]+'"');
            }
        }
			
		if (this.flashVars != null || this.flashVarString != null){
     		var fvs = this.getFlashVarsAsString();
			if (fvs.length >0){
	            flashTag += 'flashvars="'+fvs+'" ';
			}
		}
		
        flashTag += 'pluginspage="http://www.macromedia.com/go/getflashplayer">';
        flashTag += '</embed>';
    }
    return flashTag;
}

/* Function: getFlashVarsAsString
 * ------------------------------
 * Iterates throrugh the flashvars object for valid name value pairs
 * and concats them to a string.  Then concats this string to the 
 * current flashvar string, if there is one.
 */

FlashTag.prototype.getFlashVarsAsString = function() {
	var fvs = "";
	for (var n in this.flashVars) {
        if (this.flashVars[n] != undefined && this.flashVars[n] != null) {
            fvs += (escape(n)+'='+escape(this.flashVars[n])+'&');
        }
    }
	
	if (this.flashVarString != null) {
        return fvs + this.flashVarString;
    }
    return fvs.substring(0, fvs.length-1);
	
}

/**
 * Write the Flash tag out. Pass in a reference to the document to write to. 
 */
FlashTag.prototype.write = function(doc)
{
    doc.write(this.toString());
}


/* Function :fillElementById
 * ------------------------
 * bypasses current limitations in Active Content code with IE by writing the Flash Content
 * inside of the Flash Tag js file. This bypasses the 'Click To Activate' problem.
 */
FlashTag.prototype.fillElementById = function(e){
	var fc = document.getElementById(e);
	fc.innerHTML = this.toString();
}