function vali_member()
{
	if(document.frm_mem.fname.value=="")
	{
		alert("Please enter full name.");
		document.frm_mem.fname.focus();
		return false;
	}
	
	if(document.frm_mem.address.value=="")
	{
		alert("Please enter address.");
		document.frm_mem.address.focus();
		return false;
	}
	if(document.frm_mem.city.value=="")
	{
		alert("Please enter city.");
		document.frm_mem.city.focus();
		return false;
	}
	if(document.frm_mem.state.value=="")
	{
		alert("Please enter state.");
		document.frm_mem.state.focus();
		return false;
	}
	if(document.frm_mem.country.value=="")
	{
		alert("Please enter country.");
		document.frm_mem.country.focus();
		return false;
	}
	/*if(document.frm_mem.mobile.value=="")
	{
		alert("Please enter mobile number..");
		document.frm_mem.mobile.focus();
		return false;
	}
	*/
	var mobile=document.frm_mem.mobile;
	if ((mobile.value==null)||(mobile.value=="")){
		alert("Please enter your mobile number.")
		mobile.focus()
		return false
	}
	/*if (checkInternationalPhone(mobile.value)==false){
		alert("Please enter a valid mobile number.")
		mobile.value=""
		mobile.focus()
		return false;
	}
	*/
	
	if(document.frm_mem.clinik_tel.value=="")
	{
		alert("Please enter clinik number.");
		document.frm_mem.clinik_tel.focus();
		return false;
	}
	if(document.frm_mem.res_tel.value=="")
	{
		alert("Please enter residential number.");
		document.frm_mem.res_tel.focus();
		return false;
	}
	if(document.frm_mem.email.value=="")
	{
		alert("Please enter email.");
		document.frm_mem.email.focus();
		return false;
	}
	
	if(isValidEmail(document.frm_mem.email.value)==false)
	{
		alert("Please enter valid email");
		document.frm_mem.email.focus();
		return false;
	}
	if(document.frm_mem.year.value=="")
	{
		alert("Please enter year.");
		document.frm_mem.year.focus();
		return false;
	}
	if((document.frm_mem.qual_one.value!="" &&  document.frm_mem.year_one.value!="") || (document.frm_mem.qual_two.value!="" &&  document.frm_mem.year_two.value!="") || (document.frm_mem.qual_three.value!="" &&  document.frm_mem.year_three.value!="") || (document.frm_mem.qual_four.value!="" &&  document.frm_mem.year_four.value!=""))
	{
		
	}
	else
	{
		alert("Please enter atleast one educational qualification.");
		document.frm_mem.qual_one.focus();
		return false;
	}
	if(document.frm_mem.re_number.value=="")
	{
		alert("Please enter registration number.");
		document.frm_mem.re_number.focus();
		return false;
	}
	if(document.frm_mem.re_place.value=="")
	{
		alert("Please enter registration place.");
		document.frm_mem.re_place.focus();
		return false;
	}
	
	if(document.frm_mem.affilliations.value=="")
	{
		alert("Please enter hospital affilliations.");
		document.frm_mem.affilliations.focus();
		return false;
	}
	if(document.frm_mem.present_app.value=="")
	{
		alert("Please enter present appointment.");
		document.frm_mem.present_app.focus();
		return false;
	}
	if(document.frm_mem.interest.value=="")
	{
		alert("Please enter special interests in arthroscopy.");
		document.frm_mem.interest.focus();
		return false;
	}
	if(document.frm_mem.security_code.value=="")
	{
		alert("Please enter security code.");
		document.frm_mem.security_code.focus();
		return false;
	}
	update_memberdetails("changeajax");
} 
function isValidEmail(emailStr)
{
	
		if(emailStr=="")
		{
				//alert("Please enter email address.");
				 return false;
				
		}
		
			
			
			/* 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=/^(.+)@(.+)$/
			/* The following string represents the pattern for matching all special
			   characters.  We don't want to allow special characters in the address. 
			   These characters include ( ) < > @ , ; : \ " . [ ]    */
			//var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
			var specialChars="\\(\\)<>@,`';:~!#$%^&*+=|{}?\\\\\\\"\\.\\[\\]"
			
			/* 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. "sg 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. sg@[123.124.233.4] is a legal
			   e-mail address. NOTE: The square brackets are required. */
			var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
			/* The following string represents an atom (basically a series of
			   non-special characters.) */
			var atom=validChars + '+'
			/* The following string represents one word in the typical username.
			   For example, in sg.sg@somewhere.com, sg and sg are words.
			   Basically, a word is either an atom or quoted string. */
			var word="(" + atom + "|" + quotedUser + ")"
			// The following pattern describes the structure of the user
			var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
			/* 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]

			// 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
			var domainArray=domain.match(domainPat)
			if (domainArray==null) {
			//alert("The domain name doesn't seem to be valid.")
			    return false
			}

			
			var atomPat=new RegExp(atom,"g")
			var domArr=domain.match(atomPat)
			var len=domArr.length
			if (domArr[domArr.length-1].length<2 || 
			    domArr[domArr.length-1].length>5) {
			   // the address must end in a two letter or three letter word.
			  // alert("The address must end in a three-letter domain, or two letter country.")
			   return false
			}

			// Make sure there's a host name preceding the domain.
			if (len<2) {
			   var errStr="This address is missing a hostname!"
			   //alert(errStr)
			   return false
			}

			// If we've gotten this far, everything's valid!
			return true;
}