You can put your splashscreen in a div on top of your website at the first visit and when the user click on it (or on the "Enter" link), fade it with:
<div id="splashscreen">
<h2>Welcome !</h2>
Take a look at our new products, blablabla
<img src="http://i.telegraph.co.uk/multimedia/archive/02182/kitten_2182000b.jpg" />
<a href="#" class="enter_link">Enter on the website</a>
</div>
And with just 3 lines of jQuery:
$('.enter_link').click(function() {
$(this).parent().fadeOut(500);
});
The splashscreen div need to take the whole space available and have a background to hide the actual content. JSFiddle example: http://jsfiddle.net/5zP3Q/
Be aware that the splashscreen should be display on the first visit only. For that, use sessions and cookies on server side to decide if you need to display this portion of code or not.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…