function setVal() {

dz=document.form.numberofdays.options[document.form.numberofdays.selectedIndex].value;

arrivalday=document.form.arrivalday.options[document.form.arrivalday.selectedIndex].value;
arrivalmonth=document.form.arrivalmonth.options[document.form.arrivalmonth.selectedIndex].value;
arrivalyear=document.form.arrivalyear.options[document.form.arrivalyear.selectedIndex].value;

lang=document.form.lang.value;

sstemp = new Date(arrivalyear,arrivalmonth-1,arrivalday);
ss = sstemp.getTime();

min34 = minimum(dz,ss)
if (min34 == false) 
{return false;}

}