function checkmail()
{
  if(document.form3.email.value=="")
  {
  alert("Please Fill Your E-mail Address");
  document.form3.email.focus();  
  return false;
  }
  if(document.form3.email.value.indexOf("@")<=0 || document.form3.email.value.indexOf(".")<=0)
  {
  alert("Please Fill Your Valid E-mail Address");
  document.form3.email.focus();
  return false;
  }
}
function make_blank()
{
	document.form3.email.value="";
}
function make_fill()
{
 	if(document.form3.email.value=="")
	{
	document.form3.email.value="E-mail Id";
	}
}