var src_width;
var src_height;

var min_width = 840;
var min_height;

function scaleWebsite() {

    // run only once
    if (src_width == null) {
        src_width = parseInt($('#welcome_image').css('width'));
        src_height = parseInt($('#welcome_image').css('height'));
        min_height = Math.round(min_width * src_height / src_width);
    }

    //width
    var img_width = ($(window).width()-100);

    if (img_width > min_width)
        $('#welcome_image').css('width',  img_width);
    else
        img_width = min_width;

    //height
    var img_height = Math.round(img_width * src_height / src_width);

    if (img_height > min_height)
        $('#welcome_image').css('height', img_height);

    //crop
    var frame_height = ($(window).height() - 130 - 30 );
    var top = Math.round((img_height - frame_height)/-2);

    if (img_height > frame_height) {
        $('#welcome_image').css('top', top);
    }
        
    

//$('#container').css('width', width);
}