// JavaScript Document//Javascript validation 

function expertval() 
{ 

   if(document.frm_expert.txt_name.value=="") 
    {
       alert("Enter your NAME");
      document.frm_expert.txt_name.focus();
	  return false;
     }
	 
	  if(!isNaN(document.frm_expert.txt_name.value))
		{
			alert("Enter your valid NAME");
			document.frm_expert.txt_name.focus();
			return false;
		}
		
	   if(document.frm_expert.txt_email.value=="")
		 { 
         alert("Enter your EMAIL ADDRESS"); 
         document.frm_expert.txt_email.focus(); 
		 return false;
        } 
		
		if(document.frm_expert.txt_email.value!="")
		{
			
			if(!isEmail(document.frm_expert.txt_email.value))
			{
			//alert("Enter valid EMAIL ADDRESS");
			document.frm_expert.txt_email.focus();
			return false;
			}
		}
		
		if(document.frm_expert.txt_qualification.value=="") 
		{
 	      alert("Enter your QUALIFICATION");
		  document.frm_expert.txt_qualification.focus();
		  return false;
		 }
		
		 
	  if(!isNaN(document.frm_expert.txt_qualification.value))
		{
			alert("Enter your valid QUALIFICATION");
			document.frm_expert.txt_qualification.focus();
			return false;
		}
		
		if(document.frm_expert.txt_question.value=="") 
		{
 	      alert("Enter your QUESTION");
		  document.frm_expert.txt_question.focus();
		  return false;
		 }
	
	
	if(stristr($val, 'http://')
		if (document.frm_expert.txt_question.value!="")
		{
			s=document.frm_expert.txt_question.value;
			if (s.indexOf("<a href") != -1 || s.indexOf("<A HREF") != -1 || s.indexOf("<a") != -1 || s.indexOf("<A") != -1)
			{
			  alert("Enter valid QUESTION");
			  document.frm_expert.txt_question.focus();
			  return false;
			}
			if (s.indexOf("url") != -1 || s.indexOf("URL") != -1 || s.indexOf("http") != -1 || s.indexOf("HTTP") != -1)
			{
			  alert("Enter valid QUESTION");
			  document.frm_expert.txt_question.focus();
			  return false;
			}
			
			if (s.indexOf("http://") != -1 || s.indexOf("[url=") != -1)
			{
			  alert("Enter valid QUESTION");
			  document.frm_expert.txt_question.focus();
			  return false;
			}
			
			
		}
	
		/*if (document.frm_expert.txt_code.value != <?php $_SESSION['vercode'] ?>)
		{
			alert("Enter the proper Verification Code!");
			document.frm_expert.txt_code.value="";
			document.frm_expert.txt_code.focus();
			return false;
		}*/

return true;    
}


function isEmail(emailStr)
{

	/* 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 +")*$");
	/* Finally, let's start trying to figure out if the supplied address is valid. */
	/* Begin with the coarse pattern to simply break up user@domain into
	different pieces that are easy to analyze. */
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null)
	{
		/* Too many/few @'s or something; basically, this address doesn't
		even fit the general mould of a valid e-mail address. */
		alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	// Start by checking that only basic ASCII characters are in the strings (0-127).
	for (i=0; i<user.length; i++)
	{
		if (user.charCodeAt(i)>127)
		{
			alert("Ths username contains invalid characters.");
			return false;
		}
	}
	for (i=0; i<domain.length; i++)
	{
		if (domain.charCodeAt(i)>127)
		{
			alert("Ths domain name contains invalid characters.");
			return false;
		}
	}
	// See if "user" is valid 
	if (user.match(userPat)==null)
	{
	// user is not valid
		alert("The username doesn't seem to be valid.");
		return false;
	}
	/* if the e-mail address is at an IP address (as opposed to a symbolic
	host name) make sure the IP address is valid. */
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null)
	{
		// this is an IP address
		for (var i=1;i<=4;i++)
		{
			if (IPArray[i]>255)
			{
				alert("Destination IP address is invalid!");
				return false;
		   }
		}
		return true;
	}
	// Domain is symbolic name.  Check if it's valid.
	var atomPat=new RegExp("^" + atom + "$");
	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.");
			return 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.");
		return false;
	}
	// Make sure there's a host name preceding the domain.
	if (len<2)
	{
		alert("This address is missing a hostname!");
		return false;
	}
	// If we've gotten this far, everything's valid!
	return true;
	
}