function checkEmail(email)
{
	var reEmail = /^([A-Za-z0-9._])+@(\w)+(\.)(fr|com|com\.cn|net|cn|net\.cn|org|biz|info|gov|gov\.cn|edu|edu\.cn)/;
	if (!email.match(reEmail)&&email!="")
	{
		return false;
	}
	else return true;
}
function isEmail(str) {
  // are regular expressions supported?
  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));
}

function checkbeforesubmit(formname){
	var errorMsg = "";

//	form = document.forms[formname];
	form = formname;
	subject = form.elements["subject"];
	sender_email = form.elements["sender_email"];
	content = form.elements["content"];
	category = form.elements['category'];
	
	if(subject.value==''){
		errorMsg += Data_Message_Array["JS_FORM_NOT_FOUND_SUBJECT"] + "\n";
	}
	if (category.value == 0) {
		errorMsg += Data_Message_Array["JS_FORM_CONTACT_CATEGORY_MISSING"] + "\n";
	}
	if(sender_email.value==''){
		errorMsg += Data_Message_Array["JS_FORM_CONTACT_EMAIL_MISSING"] + "\n";
	}else if(checkEmail(sender_email.value)==false){
		errorMsg += Data_Message_Array["JS_FORM_CONTACT_EMAIL_FORMAT"] + "\n";
	}
	if(content.value==''){
		errorMsg += Data_Message_Array["JS_FORM_NOT_FOUND_CONTENT"] + "\n";
	}

	if( errorMsg != "" ){
		alert( errorMsg );
		errorMsg = "";
		return false;
	}
	else{
		//document.getElementById("SubmitButton").disabled = true;
		
		document.getElementById("div_ajax_sending").style.display = "inline";
//		document.getElementById("div_ajax_sent").style.display = "none";

		xajax_PostFormNoFound(xajax.getFormValues(formname)); 
		return false;
	}
	return true;
}