function dispchange(){
	//init
	var req = null;
	if(window.ActiveXObject){ //IE
		try     { req = new ActiveXObject('Msxml2.XMLHTTP'); }
		catch(e){
			try      { req = new ActiveXObject('Microsoft.XMLHTTP'); }
			catch(e2){ req =null; }
		}
	}else if(window.XMLHttpRequest){ //Firefox
		req = new XMLHttpRequest();
		req.overrideMimeType('text/xml');
	}
	
	//
	if(document.getElementById('checkdisp').checked){
		req.open('GET', '/mydata/startoff/0', true);
		req.setRequestHeader("If-Modified-Since", "Thu, 01 Jun 1970 00:00:00 GMT");
		req.send(null);
	}else{
		req.open('GET', '/mydata/starton/0', true);
		req.setRequestHeader("If-Modified-Since", "Thu, 01 Jun 1970 00:00:00 GMT");
		req.send(null);
	}
}