snow_intensive=100;
snow_speed=20000;
snow_src=new Array('s1.png','s2.png','s3.png','s4.png','s5.png','s6.png','s7.png','s8.png','s9.png');

$(document).ready(snow_start);

function snow_start() {

    snow_id=1;
    snow_y=$("#contain_snow").height()-30;
    setInterval(function() {

        snow_x=Math.random()*document.body.offsetWidth-100;
        snow_img=(snow_src instanceof Array ? snow_src[Math.floor(Math.random()*snow_src.length)] : snow_src);
        snow_elem='<img class="png" id="snow'+snow_id+'" style="position:absolute; left:'+snow_x+'px; top:0;z-index:10000" src="'+snow_img+'">';
        $("#contain_snow").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();

});}