function emailsubmit(obj)
{
 if (validate(obj)) {
 obj.submit();
 }
}

function validate(obj){
	
	 if(!obj.myname.value){
    	alert("Please enter your name");
  obj.myname.focus();
      return false
    }
      
    if(!isGoodEmail(obj.email.value)){
      alert("Your email address appears not to be valid\nplease check and amend if necessary");
      obj.email.focus();
      return false
    }
    if(!obj.telephone.value){
    	alert("Please enter your telephone number");
  obj.telephone.focus();
      return false
    }
    return true
}

function isGoodEmail(emailStr) {
var emailPat=/^(.+)@(.+)$/
var specialChars="\\(\\)<>@,;:\!\\\\\\\"\\.\\[\\]"
var validChars="\[^\\s" + specialChars + "\]"
var firstChars=validChars
var quotedUser="(\"[^\"]*\")"
var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
var atom="(" + firstChars + validChars + "*" + ")"
var word="(" + atom + "|" + quotedUser + ")"
var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
var matchArray=emailStr.match(emailPat)
if (matchArray==null) {
return false
}
var user=matchArray[1]
var domain=matchArray[2]

// See if "user" is valid
if (user.match(userPat)==null) {
   return false
}
var IPArray=domain.match(ipDomainPat)
if (IPArray!=null) {
    // this is an IP address
  for (var i=1;i<=4;i++) {
    if (IPArray[i]>255) {
     return false
    }
    }
    return true
}

// Domain is symbolic name
var domainArray=domain.match(domainPat)
if (domainArray==null) {
    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>3) {
   // the address must end in a two letter or three letter word.
   return false
}
if (domArr[domArr.length-1].length==3 && len<2) {
   return false
}
// Everything's valid:
return true;
}




function ClearPlaceHolder (input) {
	if (input.value == input.defaultValue) {
		input.value = "";
	}
}
function SetPlaceHolder (input) {
	if (input.value == "") {
		input.value = input.defaultValue;
	}
}