if (document.images) {
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     button2 = new Image
     button1.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/perstafel-b.png'
     button2.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/perstafel-a.png'
     
     button3 = new Image
     button4 = new Image
     button3.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/vo-content-b.png'
     button4.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/vo-content-a.png'
     
     button5 = new Image
     button6 = new Image
     button5.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/leermiddelenbeleid-b.png'
     button6.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/leermiddelenbeleid-a.png'
     
     button7 = new Image
     button8 = new Image
     button7.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/co2-neutraal-werken-b.png'
     button8.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/co2-neutraal-werken-a.png'
     
     button9 = new Image
     button10 = new Image
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     button10.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/de-tweede-kamerverkiezingen-a.png'
     
     button11 = new Image
     button12 = new Image
     button11.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/wikis-in-het-onderwijs-b.png'
     button12.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/wikis-in-het-onderwijs-a.png'
     
     button13 = new Image
     button14 = new Image
     button13.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/het-nieuwe-werken-b.png'
     button14.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/het-nieuwe-werken-a.png'
     
     button15 = new Image
     button16 = new Image
     button15.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/kapitaalplaza-b.png'
     button16.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/kapitaalplaza-a.png'
     
     button17 = new Image
     button18 = new Image
     button17.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/doelgroepsegmentatie-b.png'
     button18.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/doelgroepsegmentatie-a.png'
     
     button19 = new Image
     button20 = new Image
     button19.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/mail-monitor-online-b.png'
     button20.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/mail-monitor-online-a.png'
     
     button21 = new Image
     button22 = new Image
     button21.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/co2-neutraal-bezorgen-b.png'
     button22.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/co2-neutraal-bezorgen-a.png'
     
     button23 = new Image
     button24 = new Image
     button23.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/gezond-ondernemen-b.png'
     button24.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/gezond-ondernemen-a.png'

     button25 = new Image
     button26 = new Image
     button25.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/meldpunt-cybercrime-b.png'
     button26.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/meldpunt-cybercrime-a.png'

     button30 = new Image
     button31 = new Image
     button30.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/onderwijsleerportretten-b.png'
     button31.src = 'http://www.klipenklaar.nl/wp-content/themes/kek/images/onderwijsleerportretten-a.png'


 }