function openPopup(url, name, width, height, scrollBars) {

    var top = (screen.height - height) / 2;

    var left = (screen.width - width) / 2;

    var scrolls = (scrollBars == true)?"yes":"no";

    window.open(url, name, 'width=' + width + ',height=' + height + ',menubar=no,resizable=no,scrollbars='+scrolls+',status=no,toolbar=no,location=no,directories=no,left=' + left + ',top=' + top);

}



function openPopupResizable(url, name, width, height, scrollBars) {

    var top = (screen.height - height) / 2;

    var left = (screen.width - width) / 2;

    var scrolls = (scrollBars == true)?"yes":"no";

    window.open(url, name, 'width=' + width + ',height=' + height + ',menubar=no,resizable=yes,scrollbars='+scrolls+',status=yes,toolbar=no,location=no,directories=no,left=' + left + ',top=' + top);

}



function showLoading(ctx){



    var height = Math.max(document.body.clientHeight,document.body.scrollHeight);

    var width = Math.max(document.body.clientWidth,document.body.scrollWidth);



    var d = document.getElementById("loading_div");

    d.style.width=width;

    d.style.height=height;

    d.style.display="block";

    d.disabled = 'true';

}

function hideLoading(){

    var d = document.getElementById("loading_div");

    d.style.display="none";

}