function emailCheck (emailStr) {
  var emailPat=/^(.+)@(.+)$/
  var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
  var validChars="\[^\\s" + specialChars + "\]"
  var quotedUser="(\"[^\"]*\")"
  var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
  var atom=validChars + '+'
  var word="(" + atom + "|" + quotedUser + ")"
  var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
  var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
  var matchArray=emailStr.match(emailPat)
  if (matchArray==null) {
    return "Вы не указали свой email"
  }
  var user=matchArray[1]
  var domain=matchArray[2]
  if (user.match(userPat)==null) {
    return "Вы, вероятно, ошиблись при вводе своего почтового адресса"
  }
  var IPArray=domain.match(ipDomainPat)
  if (IPArray!=null) {
    for (var i=1;i<=4;i++) {
      if (IPArray[i]>255) {
	    return "Вы, вероятно, ошиблись при вводе своего почтового адресса"
      }
    }
    return ""
  }
  var domainArray=domain.match(domainPat)
  if (domainArray==null) {
    return "Вы, вероятно, ошиблись при вводе своего почтового адресса"
  }
  var atomPat=new RegExp(atom,"g")
  var domArr=domain.match(atomPat)
  var len=domArr.length
  if(domArr[domArr.length-1].length<2||domArr[domArr.length-1].length>3){
    return "Вы, вероятно, ошиблись при вводе своего почтового адресса"
  }
  if (len<2) {
    alert(errStr)
    return "Вы, вероятно, ошиблись при вводе своего почтового адресса"
  }
  return "";
}

var snowmax=40
var snowcolor=new Array("#FFFFFF")
var snowtype=new Array("Arial Black","Arial Narrow","Times","Comic Sans MS")
var snowletter="*<div style='position:relative; left: -300px'>*</div><div style='position:relative; left: -500px'>*</div><div style='position:relative; left: -500px; top: -200px'>*</div>"
var sinkspeed=2
var snowmaxsize=7
var snowminsize=1
var snowingzone=1

// Do not edit below this line
var snow=new Array()
var marginbottom
var marginright
var timer
var i_snow=0
var x_mv=new Array();
var crds=new Array();
var lftrght=new Array();
var browserinfos=navigator.userAgent
var ie5=document.all&&document.getElementById&&!browserinfos.match(/Opera/)
var ns6=document.getElementById&&!document.all
var opera=browserinfos.match(/Opera/)
var browserok=ie5||ns6||opera

function randommaker(range) {
    rand=Math.floor(range*Math.random())
    return rand
}

function initsnow() {
    if (ie5 || opera) {
        marginbottom = 300
        marginright = document.body.clientWidth
    }
    else if (ns6) {
        marginbottom = 300
        marginright = window.innerWidth
    }
    var snowsizerange=snowmaxsize-snowminsize
    for (i=0;i<=snowmax;i++) {
        crds[i] = 0;
        lftrght[i] = Math.random()*15;
        x_mv[i] = 0.03 + Math.random()/10;
        snow[i]=document.getElementById("s"+i)
        snow[i].style.fontFamily=snowtype[randommaker(snowtype.length)]
        snow[i].size=randommaker(snowsizerange)+snowminsize
        snow[i].style.fontSize=snow[i].size
        snow[i].style.color=snowcolor[randommaker(snowcolor.length)]
        snow[i].sink=sinkspeed*snow[i].size/5
        if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}
        if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}
        if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}
        if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}
        snow[i].posy=randommaker(2*marginbottom-marginbottom-2*snow[i].size)
        snow[i].style.left=snow[i].posx
        snow[i].style.top=snow[i].posy
    }
    movesnow()
}

function movesnow() {
    for (i=0;i<=snowmax;i++) {
        crds[i] += x_mv[i];
        snow[i].posy+=snow[i].sink
        snow[i].style.left=snow[i].posx+lftrght[i]*Math.sin(crds[i]);
        snow[i].style.top=snow[i].posy

        if (snow[i].posy>=marginbottom-2*snow[i].size || parseInt(snow[i].style.left)>(marginright-3*lftrght[i])){
            if (snowingzone==1) {snow[i].posx=randommaker(marginright-snow[i].size)}
            if (snowingzone==2) {snow[i].posx=randommaker(marginright/2-snow[i].size)}
            if (snowingzone==3) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/4}
            if (snowingzone==4) {snow[i].posx=randommaker(marginright/2-snow[i].size)+marginright/2}
            snow[i].posy=0
        }
    }
    var timer=setTimeout("movesnow()",70)
}

for (i=0;i<=snowmax;i++) {
    document.write("<span id='s"+i+"' style='z-index:500; position:absolute;top:-"+snowmaxsize+"'>"+snowletter+"</span>")
}
if (browserok) {
    window.onload=initsnow
}