jQuery.fn.center = function (top) {
    this.css("position","absolute");
    if (top) {
    this.css("top", Math.max(0, (($(window).height() - $(this).outerHeight()) / 2) + 
                                                $(window).scrollTop()) + "px");
    }
    this.css("left", Math.max(0, (($(window).width() - $(this).outerWidth()) / 2) + 
                                                $(window).scrollLeft()) + "px");
    return this;
}

function getSearchParams(k){
    var p={};
    location.search.replace(/[?&]+([^=&]+)=([^&]*)/gi,function(s,k,v){p[k]=v})
    return k?p[k]:p;
}

function makeURL(item, url){
    if (!url) {url = document.URL.split('?')[0]};
    var link = '';
    
    var params = getSearchParams();
    for (var param in params) {
      if (param.toUpperCase() == 'ITEM') {
        params[param]  = item;
      }
      if (param.toUpperCase() == 'TIPOFILTRO') {
        params[param]  = 0;
      }
      link = link + '&' + param + '=' + params[param];
    };
    
    return url + '?' + link.substring(1);
}

function getParameterByName(name, url) {
    if (!url) url = window.location.href;
    name = name.replace(/[\[\]]/g, "\\$&");
    var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
        results = regex.exec(url);
    if (!results) return null;
    if (!results[2]) return '';
    return decodeURIComponent(results[2].replace(/\+/g, " "));
}

function resizeElement(element, offset){
    if (($(window).width() - offset) < 300 ) {
        element.css('width', 300);
    } else {
        element.css('width', $(window).width()- offset).css('max-width',$(window).width()- offset);  
    }
    return element;
}