function getLastID(column_id) {
	var xmlHttp;

	try { // Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
    }
	catch (e) { // Internet Explorer
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			try {
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e) {
				return false;
			}
		}
	}
	xmlHttp.onreadystatechange=function() {
		if(xmlHttp.readyState==4) { // Get the data from the server's response
			if (xmlHttp.responseText=='1') {
				document.getElementById('' + column_id + '_refresh').style.display='block';
			}
		}
	}
    xmlHttp.open("GET","index.php?column_id=" + column_id,true);
    xmlHttp.send(null);

	setTimeout("getLastID('"+column_id+"')",120000);
}