var request = null;

   function createRequest() {
     try {
       request = new XMLHttpRequest();
     } catch (trymicrosoft) {
       try {
         request = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (othermicrosoft) {
         try {
           request = new ActiveXObject("Microsoft.XMLHTTP");
         } catch (failed) {
           request = null;
         }
       }
     }

     if (request == null)
       alert("Error creating request object!");
   }
   
   function sendeamilist(){
		$checkstr=true;
		/************************************************
		for email address
		 form name = 'Form1' 
		'txtEmail' --  a textbox to allow customer to enter email id
		
		**************************************************/
		/* The following variable tells the rest of the function whether or not
		to verify that the address ends in a two-letter country or well-known
		TLD.  1 means check it, 0 means don't. */
		
		var checkTLD=1;
		
		/* The following is the list of known TLDs that an e-mail address must end with. */
		
		var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
		
		/* The following pattern is used to check if the entered e-mail address
		fits the user@domain format.  It also is used to separate the username
		from the domain. */
		
		var emailPat=/^(.+)@(.+)$/;
		
		/* The following string represents the pattern for matching all special
		characters.  We don't want to allow special characters in the address. 
		These characters include ( ) < > @ , ; : \ " . [ ] */
		
		var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
		
		/* The following string represents the range of characters allowed in a 
		username or domainname.  It really states which chars aren't allowed.*/
		
		var validChars="\[^\\s" + specialChars + "\]";
		
		/* The following pattern applies if the "user" is a quoted string (in
		which case, there are no rules about which characters are allowed
		and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
		is a legal e-mail address. */
		
		var quotedUser="(\"[^\"]*\")";
		
		/* The following pattern applies for domains that are IP addresses,
		rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
		e-mail address. NOTE: The square brackets are required. */
		
		var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
		
		/* The following string represents an atom (basically a series of non-special characters.) */
		
		var atom=validChars + '+';
		
		/* The following string represents one word in the typical username.
		For example, in john.doe@somewhere.com, john and doe are words.
		Basically, a word is either an atom or quoted string. */
		
		var word="(" + atom + "|" + quotedUser + ")";
		
		// The following pattern describes the structure of the user
		
		var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
		
		/* The following pattern describes the structure of a normal symbolic
		domain, as opposed to ipDomainPat, shown above. */
		
		var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
		
		/* Finally, let's start trying to figure out if the supplied address is valid. */
		
		/* Begin with the coarse pattern to simply break up user@domain into
		different pieces that are easy to analyze. */
		var emailStr=document.form1.email_id.value;
		if(emailStr =="")
		{
			alert("Please enter the Email address");
			document.form1.email_id.focus();
			$checkstr=false;
		}
		var matchArray=emailStr.match(emailPat);
		
		if (matchArray==null) {
		
		/* Too many/few @'s or something; basically, this address doesn't
		even fit the general mould of a valid e-mail address. */
		
		alert("Email address seems incorrect (check @ and .'s)");
		document.form1.email_id.value="";
		document.form1.email_id.focus();
		$checkstr=false;
		}
		var user=matchArray[1];
		var domain=matchArray[2];
		
		// Start by checking that only basic ASCII characters are in the strings (0-127).
		
		for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
		alert("Ths username contains invalid characters.");
		document.form1.email_id.value="";
		document.form1.email_id.focus();
		$checkstr=false;
		   }
		}
		for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
		alert("Ths domain name contains invalid characters.");
		document.form1.email_id.value="";
		document.form1.email_id.focus();
		$checkstr=false;
		   }
		}
		
		// See if "user" is valid 
		
		if (user.match(userPat)==null) {
		
		// user is not valid
		
		alert("The username doesn't seem to be valid.");
		document.form1.email_id.value="";
		document.form1.email_id.focus();
		$checkstr=false;
		}
		
		/* if the e-mail address is at an IP address (as opposed to a symbolic
		host name) make sure the IP address is valid. */
		
		var IPArray=domain.match(ipDomainPat);
		if (IPArray!=null) {
		
		// this is an IP address
		
		for (var i=1;i<=4;i++) {
		if (IPArray[i]>255) {
		alert("Destination IP address is invalid!");
		$checkstr=false;
		   }
		}
		return true;
		}
		
		// Domain is symbolic name.  Check if it's valid.
		 
		var atomPat=new RegExp("^" + atom + "$");
		var domArr=domain.split(".");
		var len=domArr.length;
		for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
		alert("The domain name does not seem to be valid.");
		document.form1.email_id.value="";
		document.form1.email_id.focus();
		$checkstr=false;
		   }
		}
		
		/* domain name seems valid, but now make sure that it ends in a
		known top-level domain (like com, edu, gov) or a two-letter word,
		representing country (uk, nl), and that there's a hostname preceding 
		the domain or country. */
		
		if (checkTLD && domArr[domArr.length-1].length!=2 && 
		domArr[domArr.length-1].search(knownDomsPat)==-1) {
		alert("The address must end in a well-known domain or two letter " + "country.");
		document.form1.email_id.value="";
		document.form1.email_id.focus();
		$checkstr=false;
		}
		
		// Make sure there's a host name preceding the domain.
		
		if (len<2) {
		alert("This address is missing a hostname!");
		document.form1.email_id.value="";
		document.form1.email_id.focus();
		$checkstr=false;
		}
		
				if($checkstr==true){
					createRequest();
					 var url = "email_list_index_ajax.php?email_id="+document.form1.email_id.value;
					 request.open("GET", url, true);
					 request.onreadystatechange = updateemail;
					 request.send(null);
				}  
   }

function updateemail(){
    if (request.readyState == 4) {
		 var cash = request.responseText;
		document.getElementById("email_msg").innerHTML=cash ;
		document.form1.email_id.value="";
		//increase_divheight(1);
	}
  }
   function testimonial()
  {
     window.open('testimonial.htm',"",'width=600,height=600,scrollbars=yes');
  }
  function mailToFriend()
  {
     window.open('mailfriend.htm',"",'width=500,height=500');
  }