function isEmail(elm) {
  var i;
  if (elm == null) {
    alert("Please input your email ! ");
    return false;
  }
  if (elm.indexOf("@") == "-1" ||
      elm.indexOf(".") == "-1") {
    alert ("Please input correct email format .");
    return false;
  }
  else if (elm.indexOf(" ") != "-1") {
    alert ("Please input correct email format .");
    return false;
  }
  else if (elm.indexOf("\"") != "-1") {
    alert ("Please input correct email format .");
    return false;
  }
  for (i = 0;i < elm.length; i ++) {
    if (elm.charCodeAt(i) >= 128) {
      alert ("Please input correct email format .");
      return false;
    }
  }
  return true;
}

function chkBrowserForTopFrame() {
	if(navigator.userAgent.indexOf("Mozilla/4.0")!=-1 && navigator.userAgent.indexOf("MSIE 8.0")==-1) {
		//MSIE 6.0
		document.getElementById("topFrame").style.height="198px";
	} else {
		document.getElementById("topFrame").style.height="178px";
	}
}