function fieldRegexpFilter(r_event, r_regexp) {
    var theChar = "", r_founded = false;

    if(document.all) {
        r_event = window.event;
        theChar = String.fromCharCode(r_event.keyCode);
        if(!r_event.shiftKey) theChar = theChar.toLowerCase();
        r_founded = r_regexp.test(theChar);
        r_event.returnValue = r_founded;
    } else if (document.layers) {
        theChar = String.fromCharCode(r_event.which);
        r_founded = r_regexp.test(theChar)
    } else {
        theChar = String.fromCharCode(r_event.charCode);
        r_founded = (r_event.keyCode!=0) || r_regexp.test(theChar);
        r_event.cancelBubble = !r_founded;
    }

    return r_founded;
}


function openCenteredWindow(file,name,properties,wprefix,hprefix) {
    centeredWindow = window.open(file,name,properties);
    centeredWindow.moveTo(screen.width/2-wprefix,screen.height/2-hprefix);
}


//  (C) Milan Svrlo, released under LGPL
var http_request = false;
function getXhttpRequest(url, onReadyStateFunction) {
    if (window.XMLHttpRequest) {
        http_request = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {
            }
        }
    }
    if (!http_request) {
        alert('Cannot create XMLHTTP instance');
        return false;
    }
    http_request.onreadystatechange = onReadyStateFunction;
    http_request.open('GET', url, true);
    http_request.send(null);
}
/*
example of usage :
function check_count() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
alert(http_request.responseText + ' any text ...');
}
}
}
onclick="getXhttpRequest('http://server/page.php?', check_count); return false;"
*/


function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

function eraseCookie(name) {
    createCookie(name,"",-1);
}


function saveEstateAdToPDFAction(field) {
    var cv = "";
    var cookieValue = field.value;
    var fieldValue = field.value;
    if (fieldValue != '') {
        if (field.checked != true) {
            field.checked = false;
            cookieValue = (readCookie('estate_ad_pdf_basket_value')).replace(/null/, "");
            cookieValue = cookieValue.replace('|' + fieldValue, "");
            eraseCookie('estate_ad_pdf_basket_value');
            createCookie('estate_ad_pdf_basket_value', cookieValue, 30);
        } else {
            cookieValue = readCookie('estate_ad_pdf_basket_value') + '|' + fieldValue;
            createCookie('estate_ad_pdf_basket_value', cookieValue, 30);
        }
    }
}


function textCounter( field, countfield, maxlimit ) {
    if ( field.value.length > maxlimit ) {
        field.value = field.value.substring( 0, maxlimit );
        field.blur();
        field.focus();
        return false;
    } else {
        countfield.value = maxlimit - field.value.length;
    }
}


function setAsHomepage() {
    var userExplorer;
    userExplorer = navigator.appName;
    if (userExplorer == 'Microsoft Internet Explorer') {
        document.body.style.behavior="url(#default#homepage)";
        document.body.setHomePage('http://www.negotreal.sk/');
    }
}