isDOM=document.getElementById //DOM1 browser (MSIE 5+, Netscape 6, Opera 5+)
isMSIE=document.all && document.all.item //Microsoft Internet Explorer 4+
isNetscape4=document.layers //Netscape 4.*
isOpera=window.opera //Opera
isOpera5=isOpera && isDOM //Opera 5+
isMSIE5=isDOM && isMSIE && !isOpera //MSIE 5+
isMozilla=isNetscape6=isDOM && !isMSIE && !isOpera

var crlf = unescape("%0D%0A");
var Password_mismatch="The passwords you entered did not match.";
var Your="Your";
var ttt_short="must be more than";
var charecters="characters";
var ttt_invalid="Sorry, but this";
var ttt_invalid2="is invalid";
var badchar="contains an invalid character such as \" ' < >";


var obj;

function getLayer(layerName, parentLayerName){
  if(isDOM){ return document.getElementById(layerName) || document.getElementsByName(layerName)[0]; }
  if(isMSIE){ return document.all[layerName]; }
  if(isNetscape4){ return eval('document.layers[layerName]'); }
  return false;
}

function fireOnchange(layerName) {
    var obj = getLayer(layerName);
    if (obj && obj.onchange) obj.onchange(1);
}

function ts(e,what,text){
  mousex = e.clientX;
  mousey = e.clientY;
  pagexoff = 0;
  pageyoff = 0;
  if(isMSIE5){
    pagexoff = document.body.scrollLeft;
    pageyoff = document.body.scrollTop;
  }
  else{
    pagexoff = window.pageXOffset;
     pageyoff = window.pageYOffset;
  }
  if(getLayer(what)){
    if(isNetscape4)
      obj = getLayer(what);
    else
      obj = getLayer(what).style;


  	if(obj){
	    leftoff = mousex-pagexoff;

	getLayer(what).innerHTML=text;

	obj.left = (mousex+pagexoff)+20;


	    topoff = mousey-pageyoff;
    	if(isOpera && topoff <= 30)
    	  obj.top = mousey + 20;
	    else
		if( mousey <= 30)
	        obj.top = (mousey+pageyoff) + 20;
		else
	      if (isOpera)
    	    obj.top = mousey + 20;
	    else
    	  obj.top = (mousey+pageyoff) + 20;


	    if(isNetscape4)
    	  obj.visibility = 'show';
	    else
    	  obj.visibility = 'visible';
	  }
   }
  return true;
}

function tc(){
  if(obj){
    if(isNetscape4)
      obj.visibility = 'hide';
    else
      obj.visibility='hidden';
  }
  return true
}
function p(x, y, z) {
	for (a = 0; a < arguments.length; a++) {
		arguments[a] = arguments[a].split('');
		arguments[a] = arguments[a].reverse();
		arguments[a] = arguments[a].join('');
	}
	document.location.href = "mailto:" + x + "@" + y + "." + z;
}
function p_u(x, y, z) {
	c = arguments;
	for (b = 0; b < c.length; b++) {
        if (b == 3) continue;
		c[b] = c[b].split(',');
		c[b] = c[b].reverse();
		for (a = 0; a < c[b].length; a++)
			c[b][a] = String.fromCharCode(c[b][a] - 10);
		c[b] = c[b].join('');
	}
	document.location.href = "mailto:" + c[0] + "@" + c[1] + "." + c[2] + "?subject=" + c[3] + "";

}
function checkedit(what,minlength,type,title){
	var obj=getLayer(what);

	if (obj.value.length< minlength && minlength>0){
		obj.style.border="solid 1pt red";
		return title+" "+ttt_short+" "+(minlength-1)+" "+charecters;
	}

	if (type==1 && parseInt(obj.value)==obj.value){
		obj.style.border="solid 1pt red";
		return ttt_invalid+" "+title+" "+ttt_invalid2;
	}
	if (type==2 && (parseInt(obj.value)!=obj.value)){
		obj.style.border="solid 1pt red";
		return ttt_invalid+" "+title+" "+ttt_invalid2;
    }

    if (obj.value.lastIndexOf("<")+obj.value.lastIndexOf(">")+obj.value.lastIndexOf('"')+obj.value.lastIndexOf("'")!=-4) {
		obj.style.border="solid 1pt red";
		return title+" "+badchar;
    }

	obj.style.border="solid 1pt silver";
	return "";
}
function checkall(what){
	var obj=getLayer(what);
	var pass="";
    var tres;
    var tres2=true;
	var res = true;
	var k = obj.length;

    var errors="";

	for (var i=k-1; i>=0; i--) {
        var item = obj[i];
        if (item.type=="select-one" && item.onchange!=null){
            tres=item.onchange();
            if (tres!=""){
                res=false;
                errors+="   "+tres+crlf;
            }
        }
        if (item.type=="textarea" && item.onkeyup!=null) {
            tres=item.onkeyup();
            if (tres!=""){
                res=false;
                errors+="   "+tres+crlf;
            }
        }

        if (item.type=="text" || item.type=="password")
		if (item.onchange!=null) {
			tres = item.onchange();
			res=res && (tres.length==0);
            if (tres.length>0) errors+="   "+tres+crlf;

			if (tres.length>0) item.focus();
		}
	}

	for (i=0;i< k;i++){
		if (pass=="" && item.type=="password") pass=item.value;
		if (item.type=="password" && item.value!=pass){
			if (res) item.focus();
            errors+="   "+Password_mismatch+crlf;
			res=false;
			item.style.border="solid 1pt red";
		}
	}

    if (!res) {
        alert(errors);
    }

	return res;
}
var win = null;
function nwin(mypage,myname,w,h,scroll){LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;TopPosition = (screen.height) ? (screen.height-h)/2 : 0;settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
	win = window.open(mypage,myname,settings)
}

function writeselect(what,a,parentid,parent2id, hidempty){

    var obj=getLayer(what);

    var i;
    var oldvalue=obj.value;
    var noldvalue=false;
    var oOption


    while (obj.options.length>0) obj.options.remove(0);

    var k=0;

    oOption = document.createElement("OPTION");
    oOption.value="-1";
    oOption.text="select one...";
    obj.options.add(oOption);
    obj.value="-1";
    for (i=0;i< a.length-1;i++){
        oOption = document.createElement("OPTION");
        oOption.value=a[i][0];
        oOption.text=a[i][1];

        var v="";
        var v2="";
        if (parentid!="") v=getLayer(parentid).value;
        if (parent2id!="") v2=getLayer(parent2id).value;
        if ((a[i][2].lastIndexOf("|"+v+"|")!=-1 || v=="" || a[i][2]=="")&&
           (a[i][3].lastIndexOf("|"+v2+"|")!=-1 || v2=="" || a[i][3]=="")){
            obj.options.add(oOption);
            k++;
            if (oOption.value==oldvalue) {
                obj.value=oldvalue;
                noldvalue=true;
            }

        }
    }
//    if (noldvalue || k==1) {
    if (noldvalue) {
        obj.options.remove(0);
    }
    if (obj.onchange!=null) obj.onchange();
    if (k!=0 && hidempty=='1') {
            obj.style.display='block';
    } else if (hidempty=='1'){
            obj.style.display='none'; }
}
function checkselect(what,star,othername,title){
    var obj=getLayer(what);

    var ff=true;
    if (getLayer(othername)){
        if (getLayer(othername).value.length>0) obj.value="0";
        if (getLayer(othername).value.length==0) ff=false;
    }
    if (obj.value!="0") ff=true;
    if (star){

        if (obj.value=="-1" || !ff){
            if (!ff) getLayer(othername).style.border="solid 1pt red"; else {
                obj.style.color="red";
                if (getLayer(othername)) getLayer(othername).style.border="solid 1pt silver";
            }
            return "You must fill in the field: "+title;
        }

    }
    obj.style.color="black";
    if (getLayer(othername)) getLayer(othername).style.border="solid 1pt silver";
    return "";
}
function checktextarea(what,title,maxlength,star,showHTML,controlHTML){
    var obj=getLayer(what);
    var obj2=getLayer(what+"_dText")

    if (maxlength>0){
        //obj.value=obj.value.substr(0,maxlength);
        obj2.innerText="Remain "+(maxlength-obj.value.length)+" characters";
        if (maxlength< obj.value.length){
            obj.style.border="solid 1pt red";
            return title+" must be no more than"+ maxlength+" characters"
        }
    }

    if (star){
        if (obj.value.length==0){
            obj.style.border="solid 1pt red";
            if (showHTML) getLayer(what+"_showHTML").innerHTML="<font color=red size=12>Error</font>";
            return "You must fill in the field: "+title;
        }
    }

    if (!showHTML && controlHTML && obj.value.lastIndexOf("<")+obj.value.lastIndexOf(">")+obj.value.lastIndexOf('"')+obj.value.lastIndexOf("'")!=-4) {
		obj.style.border="solid 1pt red";
        if (showHTML) getLayer(what+"_showHTML").innerHTML="<font color=red size=12>Error</font>";
		return title+" "+badchar;
    }

    obj.style.border="solid 1pt silver";

    if (showHTML) getLayer(what+"_showHTML").innerHTML=obj.value;
    return "";
}
function checkdate(name,time,star){
    var obj1=getLayer(name+"day");
    var obj2=getLayer(name+"month");
    var obj3=getLayer(name+"year");
    var obj4=getLayer(name+"hour");
    var obj5=getLayer(name+"minute");
    var obj6=getLayer(name+"second");

    var error="You must fill in the required fields";
    if (star){
        if (obj1.value.length==0) return error;
        if (!(parseInt(obj2.value)>=0)) return error;
        if (obj3.value.length==0) return error;
        if (time){
            if (obj4.value.length==0) return error;
            if (obj5.value.length==0) return error;
            if (obj6.value.length==0) return error;
        }
    }
    return "";
}

function passw_compl(name) {
//Взято с tut.by
//Некоторая часть переделана
    var obj=getLayer(name);
    var pass=obj.value;

    var objImg=getLayer(name+"_imagemark");
	var mark = 0;
	var flag = 0;
	var pass_len = pass.length;

	for (i = 1; i <= pass_len - 1; i++)
		if (pass.substr(i, 1) == pass.substr(i - 1, 1))
			flag++;
	if (flag/(pass_len - 1) >= 0.9)
		return "images/pc1.gif";

	if (pass_len >= 3) { // proverka dliny
		mark += 1;

		var str1 = "`1234567890-=qwertyuiop[]asdfghjkl;'zxcvbnm,./"; // proverka na posledovatel'nost' simvolov kak na klaviature
		var str2 = "~!@#$%^&*()-=QWERTYUIOP[]ASDFGHJKL;'ZXCVBNM<>?";

		flag = 0;
		for (i = 0; i <= str1.length - pass_len; i++)
			if (pass == str1.substr(i, pass_len) || pass == str2.substr(i, pass_len)) {
				flag = 1;
				break;
			}
		if (!flag)
			mark += 1;

		flag = 0;
		for (i = 0; i < pass_len; i++) // proverka na prisutstvie tol'ko cifr
			if ("0123456789".indexOf(pass.substr(i, 1)) != -1)
			flag++;
		if (flag != pass_len && pass_len >= 3)
			mark += 1;

		for (i = 0; i < pass_len; i++) // proverka na prisutstvie osobyh simvolov i bukv+cifri
			if ("1234567890`~!@#$%^&*()_-+={}[]:;'?/|\"\\<>".indexOf(pass.substr(i, 1)) != -1) {
				mark += 1;
				break;
			}

		flag = 0; // proverka na prisutstvie raznix registrov
		for (i = 0; i < pass_len; i++)
			if ("QWERTYUIOPASDFGHJKLZXCVBNM".indexOf(pass.substr(i, 1)) != -1)
			flag++;
		if (flag * 100 / pass_len < 100 && flag * 100 / pass_len > 0 || pass_len >= 12)
			mark += 1;

		flag = 0; // proverka na posledovatel'nost' odinakovih simvolov
		for (i = 0; i <= pass_len - 3; i++)
			if (pass.substr(i, 1) == pass.substr(i + 1, 1) && pass.substr(i, 1) == pass.substr(i + 2, 1) && pass_len <= 8) {
				mark -= 1;
				break;
			}
        if (pass_len == 8){
            var k1=parseInt(pass.substr(0,2));
            if (pass.substr(0,1)=='0') k1=parseInt(pass.substr(1,1));
            var k2=parseInt(pass.substr(2,2));
            if (pass.substr(2,1)=='0') k3=parseInt(pass.substr(3,1));
            var k3=parseInt(pass.substr(4,4));
            if (k1>0 && k1<=31 && k2>0 && k2<=12 && k3>=1900 && k3<2020) mark-=2;
        }
		if (pass_len >= 8)
			mark += 1;
	}
	else
		if (pass_len > 0)
			mark = 1;
    if (mark<0) mark=0;
    objImg.src="\\art/mark/m" + mark + ".gif";

}
function newImage(arg) {
    if (document.images) {
        rslt = new Image();
        rslt.src = arg;
        return rslt;
   }
}
function preloadImages() {
	if (document.images) {
   		id0 = newImage("\\art/mark/m0.gif");
   		id1 = newImage("\\art/mark/m1.gif");
   		id2 = newImage("\\art/mark/m2.gif");
   		id3 = newImage("\\art/mark/m3.gif");
   		id4 = newImage("\\art/mark/m4.gif");
   		id5 = newImage("\\art/mark/m5.gif");
   		id6 = newImage("\\art/mark/m6.gif");
   	}
}

// https://stackoverflow.com/questions/28194786/how-to-make-document-queryselector-work-in-ie6
// https://github.com/inexorabletash/polyfill/blob/master/polyfill.js#L4804
(function querySelectorPolyfillInstaller() {
    // Document.querySelectorAll method
    // http://ajaxian.com/archives/creating-a-queryselector-for-ie-that-runs-at-native-speed
    // Needed for: IE7-
    if (!document.querySelectorAll) {
        document.querySelectorAll = function(selectors) {
            var style = document.createElement('style'), elements = [], element;
            document.documentElement.firstChild.appendChild(style);
            document._qsa = [];

            style.styleSheet.cssText = selectors + '{x-qsa:expression(document._qsa && document._qsa.push(this))}';
            window.scrollBy(0, 0);
            style.parentNode.removeChild(style);

            while (document._qsa.length) {
                element = document._qsa.shift();
                element.style.removeAttribute('x-qsa');
                elements.push(element);
            }
            document._qsa = null;
            return elements;
        };
    }

    // Document.querySelector method
    // Needed for: IE7-
    if (!document.querySelector) {
        document.querySelector = function(selectors) {
            var elements = document.querySelectorAll(selectors);
            return (elements.length) ? elements[0] : null;
        };
    }
})/*()*/; // misbehaves in IE 6

// https://stackoverflow.com/questions/7410949/javascript-document-getelementsbyclassname-compatibility-with-ie
// https://stackoverflow.com/questions/18944659/polyfill-for-getelementsbyclassname-for-particular-uses
// https://gist.github.com/eikes/2299607
(function getElementsByClassNamePolyfillInstaller() {
     if (!document.getElementsByClassName) {
         document.getElementsByClassName = function(search) {
             var d = document, elements, pattern, i, results = [];
             if (d.querySelectorAll) { // IE8
                 return d.querySelectorAll("." + search);
             }
             if (d.evaluate) { // IE6, IE7
                 pattern = ".//*[contains(concat(' ', @class, ' '), ' " + search + " ')]";
                 elements = d.evaluate(pattern, d, null, 0, null);
                 while ((i = elements.iterateNext())) {
                     results.push(i);
                 }
             } else {
                 elements = d.getElementsByTagName("*");
                 pattern = new RegExp("(^|\\s)" + search + "(\\s|$)");
                 for (i = 0; i < elements.length; i++) {
                     if (pattern.test(elements[i].className)) {
                         results.push(elements[i]);
                     }
                 }
             }
             return results;
         }
     }
 })();

function getElementsByClassName(className) {
    if (document.getElementsByClassName) return document.getElementsByClassName(className);
    var found = [];
    var elements = document.getElementsByTagName("*");
    for (var i = 0; i < elements.length; i++) {
        var names = elements[i].className.split(' ');
        for (var j = 0; j < names.length; j++) {
            if (names[j] == className) found.push(elements[i]);
        }
    }
    return found;
}

function showHide(selector) {
    var e = document.querySelector ? document.querySelector(selector) : getElementsByClassName(selector.substring(1))[0];
    e.style.display = (e.style.display === 'none') ? '' : 'none';
}