var MAX_MESSAGE_LEN = 600;
function check_form_email( f )
{
	var err=false;
	var idx = f.email_list.selectedIndex;
	var lstval = f.email_list.options[idx].value;
	
	if (!f.msg_email.value.trim()) {err=true; f.msg_email.focus();}
	else if (!f.msg_who.value.trim()) {err=true; f.msg_who.focus();}
	//else if (!f.msg_phone.value.trim()) {err=true; f.msg_phone.focus();}
	else if (!f.msg_content.value.trim()) {err=true; f.msg_content.focus();}
	else if (!f.captcha.value.trim()) {err=true; f.captcha.focus();}
	if (err)
	{
    	alert(all_fields_required);    	
		return false;
	}
	
	if (!validEmail( f.msg_email.value ))
	{
    	alert(wrong_email);
    	f.msg_email.focus();
		return false;
	}
	/*
	if (f.msg_phone.value.trim() && !valid_phone( f.msg_phone.value.trim() ))
	{
    	alert(wrong_phone);
    	f.msg_phone.focus();
		return false;
	}
	/**/
	return true;
}
function pass_form_email(f,obj)
{
	var gets = '';
	if (f.op) 			gets = gets + '&op='+f.op.value.trim();
	if (f.id_email)		gets = gets + '&id_email='+f.id_email.value.trim();
	
	var tmp_f = ['msg_email','msg_who','msg_phone','msg_subject','msg_content','captcha'];
	var tmp_v = '';
	for(var i=0;i<tmp_f.length;i++)
	{
		tmp_v = eval('f.'+tmp_f[i]+'.value.trim()');
		if (tmp_v)
			gets = gets + '&'+tmp_f[i]+'='+base64_encode(urlencode(tmp_v));
	}
	//f.msg_content.value.replace(/\r\n|\r|\n/g,"<br/>");
	obj.alt= obj.alt + gets;
	return true;
}
// Обработка смены пункта в списке
function chngslctval(slct,f)
{
	f.id_email.value = slct.options[slct.selectedIndex].value;
}

// Подсчет знаков в сообщении (not)
function count_length(txtar)
{
	var cnt = getObjectBW('char_cnt');
	if (cnt)
	{
		var len = txtar.value.length;
		if (len>MAX_MESSAGE_LEN)
		{
			len = MAX_MESSAGE_LEN;
			txtar.value = txtar.value.substr(0, len);
		}
		cnt.innerHTML =  'знаков: ' + len + ' из ' + MAX_MESSAGE_LEN;
	}
		else return false;
}
function urlencode( str ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Philip Peterson
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: AJ
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // %          note: info on what encoding functions to use from: http://xkr.us/articles/javascript/encode-compare/
    // *     example 1: urlencode('Kevin van Zonneveld!');
    // *     returns 1: 'Kevin+van+Zonneveld%21'
    // *     example 2: urlencode('http://kevin.vanzonneveld.net/');
    // *     returns 2: 'http%3A%2F%2Fkevin.vanzonneveld.net%2F'
    // *     example 3: urlencode('http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a');
    // *     returns 3: 'http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a'
                                     
    var histogram = {}, histogram_r = {}, code = 0, tmp_arr = [];
    var ret = str.toString();
    
    var replacer = function(search, replace, str) {
        var tmp_arr = [];
        tmp_arr = str.split(search);
        return tmp_arr.join(replace);
    };
    
    // The histogram is identical to the one in urldecode.
    histogram['!']   = '%21';
    histogram['%20'] = '+';
    
    // Begin with encodeURIComponent, which most resembles PHP's encoding functions
    ret = encodeURIComponent(ret);
    
    for (search in histogram) {
        replace = histogram[search];
        ret = replacer(search, replace, ret) // Custom replace. No regexing
    }
    
    // Uppercase for full PHP compatibility
    return ret.replace(/(\%([a-z0-9]{2}))/g, function(full, m1, m2) {
        return "%"+m2.toUpperCase();
    });
    
    return ret;
}
function utf8_encode ( string ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Webtoolkit.info (http://www.webtoolkit.info/)
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: sowberry
    // +    tweaked by: Jack
    // +   bugfixed by: Onno Marsman
    // *     example 1: utf8_encode('Kevin van Zonneveld');
    // *     returns 1: 'Kevin van Zonneveld'
 
    string = (string+'').replace(/\r\n/g,"\n");
    var utftext = "";
    var start, end;
    var stringl = 0;
 
    start = end = 0;
    stringl = string.length;
    for (var n = 0; n < stringl; n++) {
        var c1 = string.charCodeAt(n);
        var enc = null;
 
        if (c1 < 128) {
            end++;
        } else if((c1 > 127) && (c1 < 2048)) {
            enc = String.fromCharCode((c1 >> 6) | 192) + String.fromCharCode((c1 & 63) | 128);
        } else {
            enc = String.fromCharCode((c1 >> 12) | 224) + String.fromCharCode(((c1 >> 6) & 63) | 128) + String.fromCharCode((c1 & 63) | 128);
        }
        if (enc != null) {
            if (end > start) {
                utftext += string.substring(start, end);
            }
            utftext += enc;
            start = end = n+1;
        }
    }
 
    if (end > start) {
        utftext += string.substring(start, string.length);
    }
 
    return utftext;
}
function base64_encode( data ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Tyler Akins (http://rumkin.com)
    // +   improved by: Bayron Guevara
    // +   improved by: Thunder.m
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)        
    // -    depends on: utf8_encode
    // *     example 1: base64_encode('Kevin van Zonneveld');
    // *     returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='
 
    // mozilla has this native
    // - but breaks in 2.0.0.12!
    //if (typeof window['atob'] == 'function') {
    //    return atob(data);
    //}
        
    var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
    var o1, o2, o3, h1, h2, h3, h4, bits, i = ac = 0, enc="", tmp_arr = [];
    data = utf8_encode(data);
    
    do { // pack three octets into four hexets
        o1 = data.charCodeAt(i++);
        o2 = data.charCodeAt(i++);
        o3 = data.charCodeAt(i++);
 
        bits = o1<<16 | o2<<8 | o3;
 
        h1 = bits>>18 & 0x3f;
        h2 = bits>>12 & 0x3f;
        h3 = bits>>6 & 0x3f;
        h4 = bits & 0x3f;
 
        // use hexets to index into b64, and append result to encoded string
        tmp_arr[ac++] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
    } while (i < data.length);
    
    enc = tmp_arr.join('');
    
    switch( data.length % 3 ){
        case 1:
            enc = enc.slice(0, -2) + '==';
        break;
        case 2:
            enc = enc.slice(0, -1) + '=';
        break;
    }
 
    return enc;
}