$(function(){
  var height = document.documentelement.clientheight;
	var height0 = (height-450)/2;
	$('.main-im').css("top",height0);
  
	$('#close_im').bind('click',function(){
		//$('#main-im').css("height","0");
		$('#im_main').hide();
		//$('#open_im').show();
	});
	$('.go-top').bind('click',function(){
		$('body,html').animate({scrolltop:0},350);
	});
	$(".weixing-container").bind('mouseenter',function(){
		$('.weixing-show').show();
	})
	$(".weixing-container").bind('mouseleave',function(){        
		$('.weixing-show').hide();
	});
});