function showVideo(a) { 
	if(a.href.indexOf("video4.html") != -1)
		window.open(a.href, 'video', 'menubar=1,resizable=1,width=505,height=350'); 
	else if (a.href.indexOf("video1.html") != -1)
		window.open(a.href, 'video', 'menubar=1,resizable=1,width=505,height=380'); 
	else if (a.href.indexOf("video2.html") != -1)
		window.open(a.href, 'video', 'menubar=1,resizable=1,width=505,height=420'); 
		else if (a.href.indexOf("video3.html") != -1)
		window.open(a.href, 'video', 'menubar=1,resizable=1,width=505,height=355'); 
	else
		window.open(a.href, 'video', 'menubar=1,resizable=1,width=500,height=285'); 
}