//页面切换
function changeContent(type){
	$('#mainContent').contents().find("body").html("");
	if(type.id === 'lcmb'){
		$('#mainContent').attr('src','page/lcmb.jsp');
		type.className='active';
		$('#lcdy').attr('class','');
		$('#lcsl').attr('class','');
	}else if(type.id === 'lcdy'){
		$('#mainContent').attr('src','page/lcdy.jsp');
		type.className='active';
		$('#lcmb').attr('class','');
		$('#lcsl').attr('class','');
	}else if(type.id === 'lcsl'){
		$('#mainContent').attr('src','page/lcsl.jsp');
		type.className='active';
		$('#lcdy').attr('class','');
		$('#lcmb').attr('class','');
	}
}