function change_title_selected(id){
	$(id).addClass('selected_title');
}

function change_left_body_li_selected(id){
	$(id).addClass('selected_left_li');
}

function check_search_form(){
	var search_value=$('#search_text').val();
	
	if(!search_value || search_value=="search..."){
		alert('请输入搜索内容。');
		$('#search_text').val("");
		$('#search_text').focus();
		return false;
	}
}

function check_search_text(o){
	var obj=$(o);
	if(obj.val()=='search...'){
		obj.val('');
		obj.css('color','#000000');
	}
	
}

/*添加广告20110507*/