function checkfrm_m() {
	var frm = document.getElementById('myform');
	if(frm.inputemail.value == '') {
		alert('กรุณากรอกข้อมูล');
		frm.inputemail.focus();
		return false;
	}
	if (!isEmail(frm.inputemail.value)) {
				alert("รูปแบบอีเมลล์ไม่ถูกต้อง");
				frm.inputemail.focus();
				return false;
		} 
		return true;

}
function isEmail(str) {
	  var supported = 0;
	  if (window.RegExp) {
	    var tempStr = "a";
	    var tempReg = new RegExp(tempStr);
	    if (tempReg.test(tempStr)) supported = 1;
	  }
	  if (!supported) 
	  return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
	  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
	  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
	  return (!r1.test(str) && r2.test(str));
}