$(function(){
	$('.sk-nav-item').on('click',function(){
		$(this).addclass('sk-nav-itemed').siblings().removeclass('sk-nav-itemed');
	});
})
function select_pic(obj){
	$(obj).addclass('selected-pic').siblings().removeclass('selected-pic');
	var str = $(obj).children("img").attr('src');

	$('.main-img').attr('src',str.substring(0,str.length-8));
	$('#bigpic img').attr('src',str.substring(0,str.length-8));
}
function introduce_detail(obj){
	if(!$(obj).hasclass('de-active')) {
		$(obj).addclass('de-active').siblings().removeclass('de-active');
		$('.specifications').hide();
		$('.introduce').show();
	}
}
function specifications_detail(obj){
	if(!$(obj).hasclass('de-active')) {
		$(obj).addclass('de-active').siblings().removeclass('de-active');
		$('.specifications').show();
		$('.introduce').hide();
	}
}
function showbigpic(){
	$('#bigpic').show();
}
function hidebigpic(){
	$('#bigpic').hide();
}