var spanid="", preloader="";

function createRequestObject() {
	var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}
var http = createRequestObject();

function preview(ajaxpage, span, pre) {
	spanid = span;
	preloader = pre;
    http.open("GET", ajaxpage, true);
    http.onreadystatechange = handleResponseprev;
    http.send(null);
}

function handleResponseprev() {
	if(http.readyState != 4){
		document.getElementById(spanid).innerHTML = preloader;		
	}
	if(http.readyState == 4){
		var responseblogs2 = http.responseText;
			document.getElementById(spanid).innerHTML = responseblogs2;
	}
}