var _scroll_step = 2;
var _scroll_width = 896;
var _scroll_time = 60;
var _scroll_pos = _scroll_width;
var _scroll_timer = null;
var _scroll_inner = 0;
function _scroll(){
  if(_scroll_inner==0) _scroll_inner = $('#scroll_inner').width();
  _scroll_pos -= _scroll_step;
  if(_scroll_pos<-_scroll_inner) _scroll_pos = _scroll_width;
  $('#scroll').css('margin-left',_scroll_pos);
  _scroll_timer = setTimeout('_scroll()',_scroll_time);
}
function is_valid_email(emailAddress) {
	var emailStr = emailAddress;
	var emailPat=/^(.+)@(.+)$/
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	var validChars="\[^\\s" + specialChars + "\]"
	var quotedUser="(\"[^\"]*\")"
	var ipDomainPat=/^\[(\d{1,4})\.(\d{1,4})\.(\d{1,4})\.(\d{1,4})\]$/
	var atom=validChars + '+'
	var word="(" + atom + "|" + quotedUser + ")"
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	var matchArray=emailStr.match(emailPat)
	
	if (matchArray==null) {
		return false;
	}
	var user=matchArray[1]
	var domain=matchArray[2]
	if (user.match(userPat)==null) {
		return false;
	}
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				return false;
      }
		}
		return true
	}
	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>4) {
		return false;
	}
	if (len<2) {
		return false;
	}
	return true;
}