function clearText(thefield){
if (thefield.defaultValue==thefield.value)
thefield.value = ""
}	
function validate(sendForm)
{
if (sendForm.requiredname != null)
{                                
if (sendForm.requiredname.value == "")
{
alert ("Please enter a name!");
sendForm.requiredname.focus();
return false;
} 
if (sendForm.requiredname.value == "your name")
{
alert ("Please enter a name!");
sendForm.requiredname.focus();
return false;
}}
if (sendForm.requiredemail != null)
{
s = sendForm.requiredemail .value;
var isBlank = true;
if (s.length == 0)
isBlank = true;
else
for (var i = 0; i < s.length; i++)
{
var c = s.charAt(i);
if ((c != ' ') && (c != '\t'))
var isBlank = false;
}
if (isBlank)
{
alert("Please enter a valid e-mail address, \n hint - add @ sign");
sendForm.requiredemail .value = "";
sendForm.requiredemail .focus();
return false;
}
if (s.indexOf('@') < 1)
{
var msg = "Please enter a valid e-mail address, e-mail \n should contain characters \' @ \' and \' . \' ";
alert(msg);
sendForm.requiredemail .focus();
sendForm.requiredemail .select();
return false;
}
var pos = sendForm.requiredemail .value.indexOf('@');
var s = sendForm.requiredemail .value.substring(pos+1, sendForm.requiredemail .value.length);
if (s.indexOf('.') < 1 || s.indexOf('.') ==  (s.length - 1))
{
var msg = "Please enter a valid e-mail address, e-mail \n should contain characters \' @ \' and \' . \' ";
alert(msg);
sendForm.requiredemail .focus();
sendForm.requiredemail .select();
return false;
}}}