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我有一个应用程序here如何写这个if语句?
当你打开应用程序,请继续点击“添加问题”按钮,你会发现,它不会让你添加超过5个表行。这是因为这个代码在这里:
if (qnum > 5) {
return;
}
这行代码进入低于该控件添加表行的功能:
var qnum = 1;
function insertQuestion(form) {
if (qnum > 5) {
return;
}
var $tbody = $('#qandatbl > tbody');
var $tr = $("<tr class='optionAndAnswer' align='center'></tr>");
var $qid = $("<td class='qid'>" + qnum + "</td>");
$tr.append($qid);
$tbody.append($tr);
$(form).find('.numberOfQuestions').val(qnum);
++qnum;
$("#questionNum").text(qnum);
form.questionText.value = "";
}
添加的行进入此表在这里:
<table id="qandatbl" align="center">
<thead>
<tr>
<th class="qid">Question No</th>
</tr>
</thead>
<tbody></tbody>
</table>
我的问题是,我将创建一个新的函数,称为验证()函数,这将创建警报。我的问题是,如何编写if语句来声明如果最后一个问题号码不在表格行中,则会在警报中显示“您尚未添加所有问题\ n您有问题”。我如何编写if语句?
下面是当前验证的时刻()函数:
function validation() {
var marks = parseInt($("#total-weight").text());
var _qid = "";
var _msg = "";
var maxQuestions = <?php echo (int)@$_POST['textQuestion']; ?>;
var questionsAdded = $('tr.optionAndAnswer').length;
var alertValidation = "";
// Note, this is just so it's declared...
$("tr.optionAndAnswer").each(function() {
_qid = $("td.qid",this).text();
_msg = "You have errors on Question Number: " + _qid + "\n";
$(".textAreaQuestion",this).each(function() {
if (!this.value || this.value.length < 5) {
alertValidation += "\n\u2022 You have not entered a valid Question\n";
}
if (alertValidation != "") {
return false; //Stop the each loop
}
});
$(".numberAnswerTxtRow",this).each(function() {
var currenttotal = $(this).closest('.optionAndAnswer').find('.answerBtnsOn').length;
if (!this.value) {
alertValidation += "\n\u2022 Please Enter in the Number of Answers you Require for this question\n";
}
else if (currenttotal > $(this).val()){
alertValidation += "\n\u2022You have selected more answers than the required amount\n";
}
else if (currenttotal < $(this).val()) {
alertValidation += "\n\u2022 You have selected less answers than the required amount\n";
}
if (alertValidation != "") {
return false; //Stop the each loop
}
});
$(".txtWeightRow",this).each(function() {
if (!this.value) {
alertValidation += "\n\u2022 Please enter in a figure for Number of Marks for this Question\n";
}
if (alertValidation != "") {
return false; //Stop the each loop
}
});
if(alertValidation != ""){
return false;
}
});
if(alertValidation == ""){
if($("#total-weight").text() < '0')
{
_msg = '';
alertValidation = "Your Total Session Marks Remaining does not equal 0 \n\n\u2022 You Need To Remove " + Math.abs(marks) + " Marks";
}
else if($("#total-weight").text() > '0')
{
_msg = '';
alertValidation = "Your Total Session Marks Remaining does not equal 0 \n\n\u2022 You Have " + marks + " Marks Remaining";
}
else if(questionsAdded < maxQuestions){
msg = '';
alertValidation("You Have Not Added in All of Your Questions. You have " + (maxQuestions - questionsAdded) + " Questions Remaining:");
}
}
if (alertValidation != "") {
alert(_msg + alertValidation);
return false;
}
return true;
}
嗨,它不显示此警报的消息。我希望此讯息出现在#总重量<或<0之前。当该错误已解决时,显示#总重量<或<0的讯息,但目前未显示讯息问题剩余...我在我的问题中包含了我当前的验证()函数编辑 – user1181690 2012-02-05 23:39:32
您的代码更改存在错误。而不是'='你已经把'('。看看这一行'else if(questionsAdded
ShankarSangoli
2012-02-05 23:54:35
哦,等一下,我意识到我错过了一个= sign。 – user1181690 2012-02-05 23:55:19