/****************************
*	Ajax
*	return:(String)responseText
****************************/
function ajax_count(id, tp)
{
	var responseText;
	
	if(window.ActiveXObject){
	    xhr = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else if(window.ActiveXObject){
	    xhr = new ActiveXObject("Msxml2.XMLHTTP.4.0");	
	}
	else if(window.ActiveXObject){
	    xhr = new ActiveXObject("Msxml2.XMLHTTP");
	}
	else if(window.XMLHttpRequest){
	    xhr = new XMLHttpRequest();
	}
	else
	{
		alert("ÄãµÄä¯ÀÀÆ÷²»Ö§³ÖAjax!");
		return false;
	}

	xhr.onreadystatechange = function()
	{
		var ready = xhr.readyState;
		if(ready==4)
		{
			var status = xhr.status;
			if(status==200)
			{
				responseText = xhr.responseText;
				//return responseText; 
				//alert(responseText);
			}
		}
	}
	
	xhr.open('GET', '/ajax_count.asp?id='+ id +'&type='+ tp, true);
	xhr.setRequestHeader("If-Modified-Since","0");
	
	xhr.send('');
	//return responseText; 
}