// JavaScript Document
winWidth=document.all?document.body.clientWidth-418:window.innerWidth-437; 
document.write ('<iframe id="tui" src="http://www.fuerteventura.com/tui/index_it.html" frameborder="0"  height="300" width="300"');
document.write (winWidth);
document.write ('scrolling="auto"></iframe>');