function letternumber(e)
{
var key;
var keychar;

if (window.event)
   key = window.event.keyCode;
else if (e)
   key = e.which;
else
   return true;
keychar = String.fromCharCode(key);
keychar = keychar.toLowerCase();

// control keys
if ((key==null) || (key==0) || (key==8) || 
    (key==9) || (key==13) || (key==27) )
   return true;

// alphas and numbers
else if ((("abcdefghijklmnopqrstuvwxyz-'").indexOf(keychar) > -1))
   return true;
else
   return false;
}

function numbersonly(myfield, e, dec)
{
var key;
var keychar;

if (window.event)
   key = window.event.keyCode;
else if (e)
   key = e.which;
else
   return true;
keychar = String.fromCharCode(key);

// control keys
if ((key==null) || (key==0) || (key==8) || 
    (key==9) || (key==13) || (key==27) )
   return true;

// numbers
else if ((("0123456789").indexOf(keychar) > -1))
   return true;

// decimal point jump
else if (dec && (keychar == "."))
   {
   myfield.form.elements[dec].focus();
   return false;
   }
else
   return false;
}

function validate_required()
{
valid=true;

if (document.forms['cont'].firstname.value === "")
{
alert("Please enter your first name!");
document.forms['cont'].firstname;
document.forms['cont'].firstname.focus();
valid=false;
return false;
}
else(document.forms['cont'].firstname);

if (document.forms['cont'].lastname.value === "")
{
alert("Please enter your last name!");
document.forms['cont'].lastname;
document.forms['cont'].lastname.focus();
valid=false;
return false;
}

if (document.forms['cont'].emailaddy.value === "")
{
alert("Please enter your email address!");
document.forms['cont'].emailaddy;
document.forms['cont'].emailaddy.focus();
valid=false;
return false;
}

if (document.forms['cont'].phonenum.value === "")
{
alert("Please enter your phone number!");
document.forms['cont'].phonenum;
document.forms['cont'].phonenum.focus();
valid=false;
return false;
}
return valid;
}