function openImageWindow() {
        w = window.open("\/common\/imagePage.html", "imagePage", "width=880,height=680,scrollbars=yes,resizable=yes");
		w.focus();

}

function initImagePage() {
    addListener(document.getElementById("mainImage"), "click", openImageWindow);
}

function addListener(target, event, func) {
    if (target.addEventListener) { //for W3C DOM
      target.addEventListener(event, func, false);
    } else if (target.attachEvent) { //for IE
      target.attachEvent("on" + event, func);
    }
}

addListener(window, "load", initImagePage);