ns4 = (document.layers)? true:false 
ie4 = (document.all)? true:false 
ns6 = (document.getElementById && !document.all)? true:false;
ie4 = (document.all) ? true:false //required for Functions to work
ng5 = (document.getElementById) ? true:false //required for Functions to work

function view()
{
 var e=document.getElementsByName("cities");
 for(var i=0;i<e.length;i++){e[i].style.visibility = "visible";}
}

function hide()
{
 var e=document.getElementsByName("cities");
 for(var i=0;i<e.length;i++){e[i].style.visibility = "hidden"}
}