var xmlHttp;
var CONTAINER;

function doAjax( sPage, sContainerID, sParameters ) {
	
	if ( sContainerID )
        CONTAINER = sContainerID;
	
	var url = sPage + '?sid=' + Math.random();
	
	if ( sParameters ) 
		url += '&' + sParameters;
	
	xmlHttp = GetXmlHttpObject( stateChanged );
	xmlHttp.open( 'GET', url, true );
	xmlHttp.send( null );
}

function stateChanged() { 
	
	if ( xmlHttp.readyState == 4 || xmlHttp.readyState == 'complete' ) {
		if ( CONTAINER )
            document.getElementById( CONTAINER ).innerHTML = xmlHttp.responseText;
	} 
}