function emailtest(emailaddress)
{

var emailStr=emailaddress;

var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom=validChars + '+'
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
var matchArray=emailStr.match(emailPat)
if(emailStr=="")
{ return true}
if (matchArray==null) {
 	alert("For " + emailaddress + " : Email address seems incorrect (check @ and .'s)")
	return false
}
var user=matchArray[1]
var domain=matchArray[2]
if (user.match(userPat)==null) {
     alert("For " + emailaddress + " : The username doesn't seem to be valid.")
    return false
}
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
 	  for (var i=1;i<=4;i++){
	    	if (IPArray[i]>255) 	{
	        	alert("For " + emailaddress + " : Destination IP address is invalid!")
			return false
	    				}
				}
    		return true	
		}

var domainArray=domain.match(domainPat)
if (domainArray==null) {
	alert("For " + emailaddress + " : 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>7) {
   alert("For " + emailaddress + " : The address must end in a valid domain, or two letter country.")
   return false
}
if (len<2) {
   var errStr="For " + emailaddress + " : This address is missing a hostname!"
   alert(errStr)
   return false
}
return true;


}



function check (form) {


name=form.name.value;
phonenumber=form.phonenumber.value;
email=form.email.value;
//appointmenttime=form.appointmenttime.value;


if(name=="") 
{
alert("Please Enter Your Name");
form.name.focus();
return false;
}
if(phonenumber=="") 
{
alert("Please Enter Your Phone Number");
form.phonenumber.focus();
return false;
}

if(email=="") 
{
alert("Please Enter Your Email Address");
form.email.focus();
return false;
}
if(emailtest(email)==false) return false;



 


}
//  --- end  E M A I L  F U N C T I O N