function loadAjaxData(u,p,s,f){
	if(arguments.length < 3){
		return ;
	}
	p = $H(p).toQueryString();
	new Ajax.Request(					 
                    u,
                    {method: 'get', parameters: p, onSuccess:s,onFailure: f});
}
 
function trim(s){
 	return rtrim(ltrim(s)); 
}
 
function ltrim(s){
 	return s.replace( /^\s*/, ""); 
} 

function rtrim(s){ 
 	return s.replace( /\s*$/, ""); 
}