function biewaarktop() {
var str1="<span class=\"key\">(biewaarkt op "
var str3=")</span>"
var x = document.lastModified;
arr1=x.split(" ")
arr2=arr1[0].split("/")
str2=arr2[2]+"-"+arr2[0]+"-"+arr2[1]
document.write(str1+str2+str3)
}