/* clear text field
function clearText(thefield){
if (thefield.defaultValue==thefield.value)
thefield.value = ""
} */

//map
n = 1; // number of hidden layers 
function show(a){ 
for(i=1;i<=n;i++){ 
document.getElementById('t'+i).style.display = 'none'; 
} 
document.getElementById('t'+a).style.display = 'inline'; 
}
n = 1; // number of hidden layers 
function hide(a){ 
for(i=1;i<=n;i++){ 
document.getElementById('t'+i).style.display = 'inline'; 
} 
document.getElementById('t'+a).style.display = 'none'; 
}

// Window opener centered
function centeredWindow(mypage, myname, w, h, scroll) {
var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;
winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars=yes,resizable=yes'
win = window.open(mypage, myname, winprops)
//if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}