function get_series()
{
	
	var brand=document.getElementById("search_brand").value;
	if(brand == "")
	{
		document.getElementById("search_series").disabled=true;   //ทำการเครียร์ session ด้วยเพื่อไม่ให้ add series โดยไม่ทราบรุ่น
		document.getElementById("div_series").innerHTML = "<select name='search_series' id='search_series' style='font-size:9pt; width:120px' disabled><option value='0'>เลือกรุ่น</option></select>";
		
	}
	else
	{	
		var today = new Date();
		today.setTime( today.getTime() );
		var url = "http://www.car2hot.com/search/get_series.php?brand="+brand+"&td="+today;
		xmlHTTP = createXMLHttpRequest();
		xmlHTTP.open("GET", url, false);
		xmlHTTP.send('');
		var var_msg = xmlHTTP.responseText;
		if(var_msg != "")
		{
			document.getElementById("div_series").innerHTML = var_msg;
		}
		else
		{
			document.getElementById("div_series").innerHTML = "<select name='search_series' id='search_series' style='font-size:9pt; width:120px' disabled><option value='0'>เลือกรุ่น</option></select>";
			document.getElementById("search_series").disabled=true; 
		}
	
	}
}
function get_tent_area()
{
	var area_id=document.getElementById("search_area1").value;
	if(area_id==0)
	{
		document.getElementById("div_area").innerHTML = "<select name='tent_id' id='tent_id' disabled style='width:150px'><option value='0'>-เลือกเต้นท์-</option></select>";
		document.getElementById("btn_area").disabled= true;
	}
	else
	{
		var today = new Date();
		today.setTime( today.getTime() );
		var url = "http://www.car2hot.com/search/get_area.php?area_id="+area_id+"&td="+today;
		xmlHTTP = createXMLHttpRequest();
		xmlHTTP.open("GET", url, false);
		xmlHTTP.send('');
		var var_msg = xmlHTTP.responseText;
		if(var_msg != "")
		{
			document.getElementById("div_area").innerHTML = var_msg;
			document.getElementById("btn_area").disabled= false;
		}
		else
		{
			var str_temp = 
			document.getElementById("div_area").innerHTML = "<select name='tent_id' id='tent_id' disabled style='width:150px'><option value='0'>-เลือกเต้นท์-</option></select>";
			document.getElementById("btn_area").disabled= true;
			//document.getElementById("search_series").disabled=true; 
			//alert(area_id);
		}
	}
	
}
function clear_CompareCar()
{
	var today = new Date();
	today.setTime( today.getTime() );
	var url = "http://www.car2hot.com/module/session-compare-clear.php?td="+today; 
	xmlHTTP = createXMLHttpRequest();
	xmlHTTP.open("GET", url, false);
	xmlHTTP.send('');
	window.location= window.location.href;
}