Test

<a class="boxl" href="#" onclick="window.open('http://moni18-mein-shirt-shop.spreadshirt.de/','shopfenster','scrollbars=yes,width=650,height=450')"><img src="http://image.spreadshirt.net/image-server/image/product/27091840/view/1/type/png/width/190/height/190" alt="21095579-27091840"/></a>