function findmap(napr, patch)
{
 allcity=window.open(patch+napr+".html", "maparrdep", "left=0,top=0,width=740,height=430,resizable=0,scrollbars=0,status=1");
}

function show() {
 d=document.web; n=3;
 if(!d.dep.selectedIndex && !d.deph.value) n-=2;
 if(!d.arr.selectedIndex && !d.arrh.value) n-=1;
 if(n<3) findcity(n);
 else d.submit();
}