function checkoptin()
{

  var str=document.optinform.email.value;
  //alert(str);
  var oktoprocess = false;
  
  if (document.optinform.name.value=="")
  {
	alert ("Please Enter Your Name.");
    document.optinform.name.select(); 
    return false;
  }  

  if (document.optinform.email.value=="")
  {
	alert ("Please Enter Your E-Mail Address.");
    document.optinform.email.select(); 
    return false;
  }  
 
  if ((document.optinform.email.value).indexOf(" ")>=0)
  {
	alert ("Please Enter Your Correct E-Mail Address.");
	document.optinform.email.select();
	return false;
  }
	
  if (document.optinform.email.value.indexOf("@",1) == -1)
  {
	alert("Invalid E-Mail Address!");
	document.optinform.email.focus();
	document.optinform.email.select();
    return false;
  }
  
  if (document.optinform.email.value.indexOf("@") == 0)
  {
	alert("Invalid E-Mail Address!");
	document.optinform.email.focus();
	document.optinform.email.select();
    return false;
  }
  
  if (document.optinform.email.value.indexOf(".",5) == -1)
  {
	alert("Invalid E-Mail Address!");
	document.optinform.email.focus();
	document.optinform.email.select();
    return false;
  }
  
  if (document.optinform.email.value.indexOf(".") == 0)
  {
	alert("Invalid E-Mail Address!");
	document.optinform.email.focus();
	document.optinform.email.select();
    return false;
  }
  
  if ((document.optinform.email.value.lastIndexOf(".")) -(document.optinform.email.value.indexOf("@")) < 4 )
  {
	alert("Invalid E-Mail Address!");
	document.optinform.email.focus();
	document.optinform.email.select();
    return false;
  }
  
  if (!oktoprocess) 
  {
	oktoprocess = true;
	ProgressImg = document.getElementById('optinprogress_img');
	document.getElementById("optinprogress").style.visibility = "visible";
	setTimeout("ProgressImg.src = ProgressImg.src",100);
	return true;
  }
  else 
  {
    return false;
  }
	   
}