function validate_required(field,alerttxt)
{
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false}
else {return true}
}
}

function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@")
dotpos=value.lastIndexOf(".")
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false}
else {return true}
}
}

<!-- Newsletter -->

function validate_newsletter(thisform)
{
with (thisform)
{
if (validate_email(email,"An Email Address is required!")==false)
{email.focus();return false}
}
}

<!-- Contact Form -->

function validate_contact(thisform)
{
with (thisform)
{
if (validate_required(name,"Your name is required!")==false)
{name.focus();return false}
if (validate_email(email,"An Email Address is required!")==false)
{email.focus();return false}
if (validate_required(homephone,"Phone Number is required!")==false)
{homephone.focus();return false}
if (validate_required(message,"A Message is required!")==false)
{message.focus();return false}
}
}

<!-- Open in Fixed Window -->

var win = null;
function NewWindow(mypage,myname,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
win = window.open(mypage,myname,settings)
}