function changePicture(picID, picture, firstLinkID, secondLinkID) {
    if (tmpObj = document.getElementById(picID)) {
        tmpObj.src = picture;
    }
    if (tmpObj = document.getElementById(firstLinkID)) {
        tmpObj.style.color = "#F8262D";
    }
    if (tmpObj = document.getElementById(secondLinkID)) {
        tmpObj.style.color = "#000000";
    }
}

function openPopup(picID) {
    if (tmpObj = document.getElementById(picID)) {
        if (picID == "foto1" && tmpObj.src.search(/vorderhaus_1\.jpg$/) >= 0) {
            strBigURL = "gfx/vorderhaus_1_big.jpg";
            strWidth = "396";
            strHeight = "520";
        } else if (picID == "foto1" && tmpObj.src.search(/vorderhaus_2\.jpg$/) >= 0) {
          strBigURL = "gfx/vorderhaus_2_big.jpg";
            strWidth = "702";
            strHeight = "520";
        } else if (picID == "foto2" && tmpObj.src.search(/hinterhaus_1\.jpg$/) >= 0) {
          strBigURL = "gfx/hinterhaus_1_big.jpg";
            strWidth = "770";
            strHeight = "520";
        } else if (picID == "foto2" && tmpObj.src.search(/hinterhaus_2\.jpg$/) >= 0) {
          strBigURL = "gfx/hinterhaus_2_big.jpg";
            strWidth = "770";
            strHeight = "520";
        } else
            strBigURL = false;

        if (strBigURL) {
            popupWindow = window.open(strBigURL, "Popup", "width=" + strWidth + ",height=" + strHeight + ",resizable=yes,dependent=yes");
            popupWindow.focus();
        }
    }
}