function toggle(targetId,sh) {
target = document.getElementById(targetId);
if (sh=="hide"){
target.style.display="none";
} 
if (sh=="show") {
target.style.display="";
}
}

// Validate fields
function validate_required(field,alerttxt){
with (field)
{
if (value==null||value=="")
  {alert(alerttxt);return false}
else {return true}
}
}
function validate_form(thisform)
{ 
with (thisform)
{
if (validate_required(custname,"Please provide your name.")==false)
  {custname.focus();return false}
if (validate_required(custemail,"Please provide a valid email address.")==false)
  {custemail.focus();return false}
}
}