<!-- Facebook -->
button1= new Image();
button1.src = "social/p_fb.png"
button2= new Image();
button2.src = "social/a_fb.png"

<!-- twitter -->
button3= new Image();
button3.src = "social/p_tw.png"
button4= new Image();
button4.src = "social/a_tw.png"

<!-- rss -->
button5= new Image();
button5.src = "social/p_rss.png"
button6= new Image();
button6.src = "social/a_rss.png"

<!-- google_plus -->
button7= new Image();
button7.src = "social/knopf.jpg"
button8= new Image();
button8.src = "social/email.jpg"