function checkValidN()
{
	var i;	
	if(document.frmsubscribe.email_subscribe.value.length==0)
	{
		alert("Please Enter From Mail Address");
		document.frmsubscribe.email_subscribe.focus();
		return false;	
	}
	
	var input = document.frmsubscribe.email_subscribe.value;
	var lenth = input.length ;
	var ctr=0 ;

	if ( ( document.frmsubscribe.email_subscribe.value.charAt(i) == '!' ) || ( 	document.frmsubscribe.email_subscribe.value.charAt(i) == '#' ) )
    {
	  alert("Please enter a proper email address") ;
	  document.frmsubscribe.email_subscribe.focus();
      return false;
    }

	if(input.length == 40)
	{
		alert("Please enter a proper email address") ;
	    document.frmsubscribe.email_subscribe.focus();
		return false ;
	}

	for ( i=0; i < lenth; i++ )
	{
		var oneChar = input.charAt(i) ;
		if(oneChar == "@")
		{
			ctr = ctr+1 ;
		}
		if ( (i == 0 && oneChar == "@") || (i == 0 && oneChar == ".") || 
			( oneChar == " " ) )
		{
			alert ( "This does not seem to be a proper email address" ) ;
	        document.frmsubscribe.email_subscribe.focus();
			return false ;
		}
		if ( (oneChar == "@" && input.charAt(i+1) == ".") || 
			(oneChar == "." && input.charAt(i+1) == "@") ||
			(oneChar == "." && input.charAt(i+1) == ".") )
		{
			alert ( "This does not seem to be a proper email address" ) ;
	        document.frmsubscribe.email_subscribe.focus();
			return false ;
		}
		if( input.indexOf("@") < 2 )
		{
			alert ( "This does not seem to be a proper email address" ) ;
	        document.frmsubscribe.email_subscribe.focus();
			return false ;
		}
		if(input.indexOf(".")<4)
		{
			alert ( "This does not seem to be a proper email address" ) ;
	        document.frmsubscribe.email_subscribe.focus();
			return false ;
		}
		if (ctr > 1)
		{
			alert ( "This does not seem to be a proper email address" ) ;
	        document.frmsubscribe.email_subscribe.focus();
			return false ;
		}
	}
	
}