function isEmail(obj){
 	var reg =/^[\w\-\.]+@{1}[\w\-]+\.[a-zA-Z]{2}[a-zA-Z]?(\.[a-zA-Z]{2})?$/;
   if(!reg.test(obj.value)){
		obj.focus();
		return false;
	}
	else
		return true;
}

function isPhone(obj){
 	var reg =/^\d{3,4}\-{1}\d{7,8}$/;
   if(!reg.test(obj.value)){
		obj.focus();
		return false;
	}
	else
		return true;
}

function isFax(obj){
 	var reg =/^\d{3,4}\-{1}\d{7,8}$/;
   if(!reg.test(obj.value)){
		obj.focus();
		return false;
	}
	else
		return true;
}

function isMobile(obj){
 	var reg =/^\d{0,20}$/;
   if(!reg.test(obj.value)){
		obj.focus();
		return false;
	}
	else
		return true;
}

function isPostalCode(obj){
 	var reg =/^\d{0,10}$/;
   if(!reg.test(obj.value)){
		obj.focus();
		return false;
	}
	else
		return true;
}

function count_checked(obj) {
  var number_checked=0;
  var box_count=obj.length;
  if ( box_count==null ) {
  if ( obj.checked==true ) {
  number_checked=1;}else {
  number_checked=0;}}
  else {
  for ( var i=0; i < (box_count); i++ ) {
  if ( obj[i].checked==true ) {
  number_checked++;}}}return number_checked;}