var container='header-menu';
var snow_intensive=200; 
var snow_speed=5000; 
var snow_src='/img/snow/'; 
var snow_ext = detectIE6() ? '.gif' : '.png';

$(document).ready(snow_start); 

function snow_start() { 
	snow_id=1; 
	snow_y=$("#" + container).height()-5; 
	setInterval(function() { 
		snow_x=Math.random()*document.body.offsetWidth-100; 
		snow_img= snow_src + Math.floor(Math.random()* 8.4) + snow_ext; 
		snow_elem='<img class="png" id="snow'+snow_id+'" style="position:absolute; left:'+snow_x+'px; top:0;z-index:10000" src="'+snow_img+'">'; 
		$("#" + container).append(snow_elem); 
		snow_move(snow_id); 
		snow_id++; 
	},snow_intensive);
} 

function snow_move(id) { 
	$('#snow'+id).animate({top:snow_y,left:"+="+Math.random()*100},snow_speed,function() { 
	$(this).empty().remove(); 
});} 

function detectIE6(){
  var browser = navigator.appName;
  if (browser == "Microsoft Internet Explorer"){
    var b_version = navigator.appVersion;
    var re = /\MSIE\s+(\d\.\d\b)/;
    var res = b_version.match(re);
    if (res[1] <= 6){
      return true;
    }
  }
  return false;
}