var allHTMLTags=[];function laatZien(a){var b=document.getElementsByTagName("span");for(i=0;i<b.length;i++)if(b[i].className==a)b[i].style.display=""}function getElementByClass(a){var b=document.getElementsByTagName("span");for(i=0;i<b.length;i++)if(b[i].className==a)b[i].style.display="none"}function listItems(a){for(j=0;j<a.length;j++)laatZien(a[j])}function listItemsoff(a){for(j=0;j<a.length;j++)getElementByClass(a[j])} function validate(){document.myform.libero.checked==!1&&listItemsoff(L);document.myform.setter.checked==!1&&listItemsoff(S);document.myform.pos4.checked==!1&&listItemsoff(P);document.myform.middleblocker.checked==!1&&listItemsoff(M);document.myform.opposite.checked==!1&&listItemsoff(O);document.myform.libero.checked==!0&&listItems(L);document.myform.setter.checked==!0&&listItems(S);document.myform.pos4.checked==!0&&listItems(P);document.myform.middleblocker.checked==!0&&listItems(M);document.myform.opposite.checked== !0&&listItems(O)};