x01 = new Image();
x01.src = "images/g_w_001.jpg";
x02 = new Image();
x02.src = "images/g_w_002.jpg";
x03 = new Image();
x03.src = "images/g_w_003.jpg";
x04 = new Image();
x04.src = "images/g_w_004.jpg";
x05 = new Image();
x05.src = "images/g_w_005.jpg";
x06 = new Image();
x06.src = "images/g_w_006.jpg";
x07 = new Image();
x07.src = "images/g_w_007.jpg";
x08 = new Image();
x08.src = "images/g_w_008.jpg";
x09 = new Image();
x09.src = "images/g_w_009.jpg";
x10 = new Image();
x10.src = "images/g_w_010.jpg";

function winter(ImageName, ImageObjektName)
{
    // ImageName - Name des auszutauschenden Bildes z.B. Urlaub
    // ImageObjektName - Name des Bildes mit dem ausgetauscht wird z.B. i02
    document.images[ImageName].src = eval(ImageObjektName + ".src")
}