function changeClass(en,cn)
{if(!document.getElementById(en))
{return;}
var element=document.getElementById(en);element.className=cn;}
function toggleQuestion(){divClass=$(this).attr('id');checkbox=$('#'+$(this).attr('for'));var checkboxes=new Array();checkboxes[1]="vergaderen";checkboxes[2]="presentaties";checkboxes[3]="videocom";var current_checkbox="";if(divClass=='q1'||divClass=='q2'||divClass=='q3')
{for(i=1;i<checkboxes.length;i++)
{if(checkboxes[i]==$(this).attr('for'))
{current_checkbox=i;}
else
{$('#'+checkboxes[i]).removeAttr('checked');$('#q'+i).attr('class','checkbox_unchecked');$('#q'+i+'a').hide();}}}
if(!checkbox.attr('checked')){$('#'+divClass+'a').show();$('#extrainfo').show();}
else{$('#'+divClass+'a').hide();$('#extrainfo').hide();}}