function check3()
{
  var form=document.forms["register"];

  if (form.email.value.length != 0)
  {
    if (form.email.value.charAt(0) == "." || form.email.value.charAt(0) == "@" || form.email.value.indexOf('@', 0) ==  - 1 || form.email.value.indexOf('.', 0) ==  - 1 || form.email.value.lastIndexOf("@") == form.email.value.length - 1 || form.email.value.lastIndexOf(".") == form.email.value.length - 1)
    {
      alert("Email address format is not correct! ");
      form.email.focus();
      return false;
    }
  }
  else
  {
    alert("Email not empty! ");
    form.email.focus();
    return false;
  }
/*  if (form.first_name.value=="")
  {
    alert("Your Surname Not is null, please input!");
    form.first_name.focus();
    return false;
  }*/
  if (form.last_name.value=="")
  {
    alert("Your Name Not is null, please input!");
    form.last_name.focus();
    return false;
  }
  if(form.password.value!=""){
	  if (form.password.value.length < 6)
	  {
		alert("Password Length must >6,please input!");
		form.password.focus();
		return false;
	  }
		
	  if (form.password.value != form.password2.value)
	  {
		form.password.value = '';
		form.password2.value = '';
		alert("Two different input password, please re-entry. ");
		form.password.focus();
		return false;
	  }
  }
        if (form.phone.value=="")
  {
    alert("Your contact mobile Not is null, please input!");
    form.phone.focus();
    return false;
  }
        /*  if (form.msn.value=="")
  {
    alert("Your msn Not is null, please input!");
    form.msn.focus();
    return false;
  }
  if (form.others.value=="")
  {
    alert("Your others Not is null, please input!");
    form.others.focus();
    return false;
  }*/
  
  if(form.usertype[0].checked){
  
		if (form.measurements1.value=="XX" || form.measurements2.value=="XX" || form.measurements3.value=="XX")
	  {
		alert("Your Measurements error, please input!");
		form.measurements.focus();
		return false;
	  }
	  
		  if (form.height.value=="")
	  {
		alert("Your height Not is null, please input!");
		form.height.focus();
		return false;
	  }
  }
 
  
}

function formss_f1(v){
	 var form=document.forms[v];
	
	 if(form.password.value!=""){
	  if (form.password.value.length < 6)
	  {
		alert("Password Length must >6,please input!");
		form.password.focus();
		return false;
	  }
		
	  if (form.password.value != form.password2.value)
	  {
		form.password.value = '';
		form.password2.value = '';
		alert("Two different input password, please re-entry. ");
		form.password.focus();
		return false;
	  }
  }
	
	}





	<!-- Begin
var checkflag = "false";
function check(field) {
//	alert("d");
if (checkflag == "false") {
for (i = 0; i < field.length; i++) {
field[i].checked = true;}
checkflag = "true";
return "false"; }
else {
for (i = 0; i < field.length; i++) {
field[i].checked = false; }
checkflag = "false";
return "true"; }
}
//  End -->