大表格或javascript锁定浏览器

时间:2012-01-19 22:55:54

标签: javascript jquery ajax blocking

我有一个包含大约105个字段的html表单,其中包含一些javascript活动:

1)展开/折叠部分

http://www.adipalaz.com/experiments/jquery/nested_accordion.html

2)日期选择器

3)自动保存功能

<script type="text/javascript">
    function counter() {
    email = document.getElementById("applicant-email").value;
        if (email.match(emregex) || cd == cdLength){
            if (email.match(emregex)){
            document.getElementById("countdown").innerHTML = left + cd-- + right + button;
            if (cd < 0){
                formAutosave();
            }
            }else{
                document.getElementById("countdown").innerHTML = "Enter your email address for AutoSave <a onclick=\"javascript:alert(\'Please enter an email address\');\"><span><b></b>Save Now</span></a>";
            }
        }
    };
    function formAutosave() {
        window.clearInterval(timer);
    email = document.getElementById("applicant-email").value;
        if (email.match(emregex)){
            document.getElementById("countdown").innerHTML = \'<a><span><b></b>Saving ...</span></a>\';
            var values = "";
    for (var i = 0; i < userForm.length; i++) {
        if (userForm.elements[i].value != null) {
            if (userForm.elements[i].name == "form[autosave]") {
            userForm.elements[i].value = "TRUE";
                    }
                    if (userForm.elements[i].id == "'.$fieldId.'"){
            userForm.elements[i].value = email;
        }
        if (userForm.elements[i].id != "finished"){
            values += userForm.elements[i].name + "=" + encodeURI(userForm.elements[i].value) + "&";
                    }
            }
        }
            values = values.substring(0, values.length - 1);
            jQuery.post(                 
                "http://'.$_SERVER['SERVER_NAME'].
                    $uri.strstr($uri,'?')?'&':'?').'autosave=1&format=raw",
        values,
        function (submissionId){
            if (parseInt(submissionId) > 0){
                jQuery("#continue").val(parseInt(submissionId));
            }
                        cd = cdLength;
            timer = window.setInterval("counter()", 1000);
                    }
                );
            };
        };

    var userForm = document.getElementById("userForm");
        var emregex = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
        cdLength = '.self::SAVEINTERVAL.';

    var left = \'Automatically saving in \';
    var cd = cdLength;
    var right = \' seconds or \';
    var button = \'<a onclick="javascript: formAutosave();"><span><b></b>Save Now</span></a>\';

        jQuery("#applicant-email").val(jQuery("#'.$fieldId.'").val());
    var timer = window.setInterval("counter()", 1000);

';

我们已经录制了3个测试视频(Chrome,Firefox,IE9),即使用户没有使用展开/折叠或日期选择器,所有这些视频都会在表单中使用下拉列表显着减速。所以我期待我们在自动保存例程中导致锁定或内存泄漏。

对于重构的建议将不胜感激。

1 个答案:

答案 0 :(得分:0)

以上评论很棒,我建议按照@Adam和@Alex发布的建议(改为通过命名函数)。此外,您可能尝试以不同的方式实现(即模块设计模式或其他一些最佳实践)。看看这个StackOverflow问题:https://stackoverflow.com/questions/4840420/recommended-javascript-annotated-source-code-for-learning