function searchPost()
{
	var words = document.getElementById('words').value;	
	if(words.length==0)
	{
		alert('请输入您要搜索的关键词');
		return false;
	}
	return true;
}

function searchTravelPost()
{
	var from = document.getElementById('from').value;	
	var to = document.getElementById('to').value;	
	var words = document.getElementById('words').value;	
	if(words.length==0 && from.length==0 && to.length==0)
	{
		alert('请至少输入一项搜索条件');
		return false;
	}
	return true;
}

//菜单与内容的切换效果
function switchBar(menu,content,index,classname)
{	
	$(menu).attr('class','');
	$(menu+':eq('+index+')').attr('class',classname);
	$(content).css('display','none');
	$(content+':eq('+index+')').css('display','');
}