function checkData()
{
	
    if(document.form1.fname.value=="")
	{
		alert("Please enter First Name");
		document.form1.fname.focus();
		return false;
	}
	if(document.form1.lname.value=="")
	{
		alert("Please enter Last Name");
		document.form1.lname.focus();
		return false;
	}	

	if ((document.form1.email.value.indexOf('@') < 0) || (document.form1.email.value.indexOf('.') < 0))
{
  alert("Please enter valid email id");
  document.form1.email.focus();
  return false;
}	
	if(document.form1.sub.value=="")
	{
		alert("Please enter your subject");
		document.form1.sub.focus();
		return false;
	}
	if(document.form1.message.value=="")
	{
		alert("Please enter your message");
		document.form1.message.focus();
		return false;
	}
	
	

}