var isIE = /(msie|internet explorer)/i.test(navigator.userAgent);

function isFirefox() {
	return !isIE;
}

function ffPrintFix(objId, imgData) {
	
	if (isIE) return;
	
	var obj = document.getElementById(objId);
	
	if (obj == null) return;
	
	//step #1: get parent node
	var parent = obj.parentNode;
	if (parent == null) return;
	
	//step #2: get header
	var head = document.getElementsByTagName('head');
	head = ((head.length != 1) ? null : head[0]);
		
	if (head == null) return;
		
	//step #3: write normal css rule		
	var style = document.createElement('style');
	style.setAttribute('type','text/css');
	style.setAttribute('media','screen');
	
	var imgDescriptor = 'img#'+objId+'_screen';
	var imgRule = "width: "+obj.width+";\n"+
				  "height: "+obj.height+";\n"+
				  "padding: 0;\n"+
				  "margin: 0;\n"+
				  "border: 0;\n";
	style.appendChild(document.createTextNode(imgDescriptor + '{' + imgRule + "}\n"));
	//add style to head
	head.appendChild(style);
	
	//step #4: write print css rule
	style = document.createElement('style');
	style.setAttribute('type','text/css');
	style.setAttribute('media','print');
	
	//write image style
	imgDescriptor = 'img#'+objId+'_screen';
	imgRule = 'display: block;';
	
	style.appendChild(document.createTextNode(imgDescriptor + '{' + imgRule + '}'));
	
	//write object style
	var objDescriptor = 'embed#'+objId;
	var objRule = 'display: none;';
	style.appendChild(document.createTextNode(objDescriptor + '{' + objRule + '}'));
	
	//add style to head
	head.appendChild(style);
	
	//step #5: get image
	var needAppend = false;
	var img = document.getElementById('img');
	if (img == null) {
		img = document.createElement('img');
		needAppend = true;
	}
	
	img.src = 'data:image/png;base64,'+imgData;
	if (needAppend)
		parent.appendChild(img);
}