var preloadFlag = false; var ie = (navigator.appName.toLowerCase().indexOf('microsoft') != -1); var ns = (navigator.appName.toLowerCase().indexOf('netscape') != -1); var win = (navigator.platform.toLowerCase().indexOf('win') != -1); var mac = (navigator.platform.toLowerCase().indexOf('mac') != -1); var browserVer = parseFloat(ie ? navigator.appVersion.substring(navigator.appVersion.toLowerCase().indexOf('msie') + 4) : navigator.appVersion); function newImage(arg) { if (document.images) { rslt = new Image(); rslt.src = arg; return rslt; } } function changeImages() { if (document.images && (preloadFlag == true)) { for (var i = 0; i < changeImages.arguments.length; i += 2) { document[changeImages.arguments[i]].src = changeImages.arguments[i+1]; } } } function getCookie(strname) { var c = document.cookie; var p = c.split(";"); for(var i = 0; i < p.length; i++) { var a = p[i].split('='); while(a[0].charAt(0) == ' ') a[0] = a[0].substr(0); if(a[0] == strname && a.length > 1) return a[1]; } return ''; } function fieldIsEmpty(obj, strprompt) { var s = obj.value; if (s == '') { alert(strprompt); obj.focus(); return true; } return false; } function validateEmail(str) { var re = new RegExp('^\\w+((-\\w+)|(\.\\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\\.[A-Za-z0-9]{2,}$'); return re.test(str); } function isValidFormalName(str) { var re = new RegExp('^[A-Za-z][\\w_]*$'); return re.test(str); } function popWindow(u, nwidth, nheight, bscroll) { var w, h, x, y, p; w = nwidth; h = nheight; if (ie && mac) { w -= 16; h -= 16; } x = (screen.availWidth - w)/2; y = (screen.availHeight - h)/2; p = 'resizable,left=' + x + ',top=' + y + ',width=' + w + ',height=' + h; if (bscroll) p += ',scrollbars'; window.open(u, 'Propower', p); } function popPPWindow(u) { var w, h, x, y, p; var heightNeeded = 650; if (screen.availHeight >= heightNeeded) { w = 800; h = 600; } else { w = 640; h = 480; } if (ie && mac) { w -= 16; h -= 16; } x = (screen.availWidth - w)/2; y = (screen.availHeight - h)/2; p = 'resizable,left=' + x + ',top=' + y + ',width=' + w + ',height=' + h; window.open(u, 'Propower', p); } function popIntroEnglishWindow(u, nwidth, nheight) { var w, h, x, y, p; w = nwidth; h = nheight; if (ie && mac) { w -= 16; h -= 16; } x = (screen.availWidth - w)/2; y = (screen.availHeight - h)/2; p = 'resizable,left=' + x + ',top=' + y + ',width=' + w + ',height=' + h; popwin = window.open(u, 'IntroductoryEnglish', p); popwin.focus(); } var htmlpopwin; function popScreenWithHtml(theFilepath,theTitle,w,h) { if (w == null) w = 800; if (h == null) h = 600; var aHtmlText = '' + theTitle + '<\/title><\/head>' + '<body bgcolor=\"#000000\" leftmargin=\"0\" topmargin=\"0\" rightmargin=\"0\" bottommargin=\"0\" marginwidth=\"0\" marginheight=\"0\">' + '<img src=\"' + theFilepath + '\" width=\"' + w + '\" height=\"' + h + '\">' + '<\/body> <\/html>'; if (ie && mac) { w -= 16; h -= 16; } x = (screen.availWidth - w)/2; y = (screen.availHeight - h)/2; p = 'resizable,left=' + x + ',top=' + y + ',width=' + w + ',height=' + h; htmlpopwin = window.open('', '_blank', p); htmlpopwin.document.write(aHtmlText); htmlpopwin.focus(); } function tellafriend(s, b) { if (s == null) s = 'Page at EnglishElearning: ' + document.title; if (b == null) b = 'Check out this page: ' + document.location; location = 'mailto:?subject=' + s + '&body=' + b; }