function getHTML(url, pars, ID){
$(ID).innerHTML = '<div id="loadingBox"><img src="layout/ajax-loader.gif" alt="Loading..."/></div>';
	var myAjax = new Ajax.Updater( {success: ID}, url, {
			method: 'get', 
			parameters: pars, 
			onFailure:function() {
				$(ID).innerHTML='Error...';
			},
			evalScripts:true,
			asynchronous:true 
		}
	);
}

function getHeader(url, pars, ID){
getHTML('banner.html','','mainBox');
$(ID).innerHTML = '<div id="loadingBox"><img src="layout/ajax-loader.gif" alt="Loading..."/></div>';
	var myAjax = new Ajax.Updater( {success: ID}, url, {
			method: 'get', 
			parameters: pars, 
			onFailure:function() {
				$(ID).innerHTML='Error...';
			},
			evalScripts:true,
			asynchronous:true 
		}
	);
}