var http_request = false;
   function makePOSTRequest(url, parameters) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = alertContents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById('myspan').innerHTML = result;            
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function get(obj) {
   valid_message();
    //  var poststr = "detail=" + encodeURI( document.getElementById("detail").value ) +
                    "&name=" + encodeURI( document.getElementById("name").value );

   var poststr = "detail=" + escape(encodeURI(document.getElementById("detail").value ))
                  +"&name=" + escape(encodeURI( document.getElementById("name").value ))
	         +"&contactway=" + escape(encodeURI(window.location.href))
		 +"&lang=cn"
		  
		  ;

      makePOSTRequest('http://www.xanthan-gum.org/buy_xanthan_gum/thinkmsg.php', poststr);
   }


////////// form check

String.prototype.Trim  = function(){return this.replace(/^\s+|\s+$/g,"");}

function valid_message()
{
	objMess = document.lea_mess.detail;
	objContact = document.lea_mess.name;
	
	objMess.value = objMess.value.Trim();
	objContact.value = objContact.value.Trim();
	
	strMess = objMess.value;
	strContact = objContact.value;
	
	if (strMess.length > 200)
	{
		alert('您的留言过长，请减少至200字内，谢谢！');
		return false;
	}
	if (strContact.length > 50)
	{
		alert('您的联系方式过长，请减少至50字内，谢谢！');
		return false;
	}
	if ((strMess.length < 1 || strMess==objMess.defaultValue) && strContact.length>0)
	{
		alert('您还没有填写留言内容，请在留言内容框内填写完提交，谢谢！');
		return false;
	}
	if ((strContact.length < 1 || strContact==objContact.defaultValue) && strMess.length>0)
	{
		alert('您还没有填写联系方式，请在联系方式框内填写完提交，谢谢！');
		return false;
	}
	if ((strContact.length < 1 && strMess.length<1) ||  (strMess==objMess.defaultValue && strContact==objContact.defaultValue))
	{
		alert('您好，留言不能为空，谢谢！');
		return false;
	}
	if(!confirm('您确定发送留言吗?')) 
	{
		return false;
	}
	
	return false;
}

function msee_init () {
	document.lea_mess.detail.value = document.lea_mess.detail.defaultValue;
	document.lea_mess.name.value = document.lea_mess.name.defaultValue;
}