// global variables var pic = null; var popImg = null; var imgCount = 0; function winOpen() { return (popImg != null && popImg.closed != true) ? true : false; } function ImgPopUp(picName,winWidth,winHeight) { // if existing pic with same name, pop it up else create new window & pop it up if (pic == picName && winOpen()) { popImg.focus(); } else { // close any pop up windows now open - do not close if early IE if (navigator.appName != "Microsoft Internet Explorer" || parseInt(navigator.appVersion) >=4) { if (popImg != null && !popImg.closed) popImg.close(); } pic = picName; // build new pop up window imgWinName = "popImg" + imgCount++; // unique name for each pop-up window popImg = window.open("",imgWinName, "toolbar=no,scrollbars=no,resizable=no,width=" + winWidth + ",height=" + winHeight); var htmlString = ""; popImg.document.open(); popImg.document.write(htmlString); popImg.document.close(); } return false; }