function alertF(str,obj,mode){

	alert(str);
	if(!obj.length){ 
		obj.focus();
		if(typeof(obj)=='text' || typeof(obj)=='password')obj.select();
	}else{
		obj[0].focus();
		if(typeof(obj[0])=='text'|| typeof(obj[0])=='password')obj[0].select();
	}	
	if(mode==0)return;
	else return false;
}