function changelogin(login){
	if(login.length ==  4 ){
		get_ajax_info('WebData/pb.wb_pict_updownload.get_imgpath?username_=' + login);
	}
}

function get_ajax_info(url_){
	var res_data;
	if (window.XMLHttpRequest) {
		var req = new XMLHttpRequest();
	}
	else if (window.ActiveXObject) {    
		var req = new ActiveXObject("msxml2.XMLHTTP");
	} 
	if (req) {
		req.onreadystatechange = function proc_req() {	
			var ready = req.readyState;
			if (ready ==  4 ) {
				res_data = ""+req.responseText;   
				req = null;
				handle_ajax_data(res_data);
			} 
			
		}
		req.open("post", url_, true);
		req.send(null);
	}             
return false          
}