我正在创建一个表单,允许您在我们的网站上注册警报,方法是允许用户将关键字输入到表单中。如何将元素存储到数组中,并检查值是否存在?
我已经设置了验证,虽然我用过的jquery看起来有些复杂,即使对我来说也行得通!
我现在试图设置表单,以便当您输入关键字时,它会检查您是否已经放入该关键字。
例如我在列表中添加了“云”,我不小心尝试再次添加它,表单应该提醒我,不允许我将它添加到我的列表中。
我认为,解决办法是通过使用for each循环就像在PHP中的关键字存储在“关键字列表”数组,然后循环:
foreach (KeywordList as KeywordListArrayElement){
if(KwValue == KeywordListArrayElement){
alert ("The keyword '+KwValue+' has already been added");
return false;
}
}
但我不知道如何保存阵列中的关键字或从
这里取这是我的HTML:
<form action="" method="get" name="Test Form" target="_self" id="alerts_form" dir="ltr" lang="en">
<fieldset id="alerts_options">
<label for="email_address">Email: </label>
<input type="text" id="email_address" name="email_address" tabindex="1" autofocus="autofocus" autocomplete="on" required="required" value="" /><div class="email-alert form_val" style="display: none;">Please enter a valid email address</div><br />
<label for="keywords">Keyword(s): </label>
<input type="text" id="keywords" name="keywords[]" tabindex="2" autocomplete="on" value="" />
<button id="addKeyword" name="addKeyword" value="">+</button><br />
<div id="KeywordList"></div>
<div class="keyword-alert form_val" style="display: none;">Please input at least one keyword</div>
<label for="frequency">Frequency: </label>
<select tabindex="3" id="frequency" name="frequency"><br />
<optgroup>
<option selected="selected" value=""></option>
<option value="1">Daily</option>
<option value="7">Weekly</option>
<option value="30">Monthly</option>
</optgroup>
</select><div class="frequency-alert form_val" style="display: none;">Please make a selection</div><br />
<input type="hidden" id="Step" name="Step" value="2" />
<div class="clear"></div>
<button class="alert_button" type="submit" id="submit" name="UpdateAlertOption" value="Unconfirmed">Submit</button><br />
<button class="alert_button" type="submit" name="UpdateAlertOption" value="Delete">Delete</button><br />
<button class="alert_button" type="submit" name="UpdateAlertOption" value="Delete All">DeleteAll</button>
<input type="hidden" value="" name="" class="KwdBox" />
</fieldset>
</form>
这里是我的JQuery:
<script type='text/javascript'>
jQuery(document).ready(function($){
$("#addKeyword").click(function(event) {
event.preventDefault();
var KwValue = $("#keywords").val();
if($("#keywords").val()==""){
alert('Please input a keyword');
}
else
{
var squareBrackets = "[]";
$("#keywords").css('background-color', '#FFFFFF');
$("#alerts_options .keyword-alert").hide();
$('<input type="text" class="KwdBox" name="keywords'+squareBrackets+'" value="'+KwValue+'" tabindex="2" autocomplete="on" required="required"/>')
.appendTo('#KeywordList');
$("#keywords").val("");
$(".KwdBox").click(function(event){
event.preventDefault();
$(this).remove();
});
}
});
$("#alerts_options .email-alert").hide();
$("#alerts_options .keyword-alert").hide();
$("#alerts_options .frequency-alert").hide();
$("#submit").click(function(){
var frequency = 1;
if($("[name=frequency]").val()==""){
frequency = 0;
}else{
frequency = 1;
}
var keyword = 1;
if($("#keywords").val()=="") {
keyword = 0;
}
if($(".KwdBox").val() >""){
keyword = 1;
}
var email = 1;
if(!checkEmail($("[name=email_address]").val())){
email = 0;
}else{
email = 1;
}
//frequency empty, email empty, kw empty
if(frequency == 0 && email == 0 && keyword == 0){
$("#keywords").css('background-color', 'rgb(255, 232, 232)');
$("[name=email_address]").css('background-color', 'rgb(255, 232, 232)');
$("[name=frequency]").css('background-color', 'rgb(255, 232, 232)');
$("#alerts_options .form_val").show();
return false;
}
else{
$("#alerts_options .form_val").hide();
} //frequency empty, email on, kw empty
if(frequency == 0 && email > 0 && keyword == 0){
$("#keywords").css('background-color', 'rgb(255, 232, 232)');
$("[name=email_address]").css('background-color', '#FFFFFF');
$("[name=frequency]").css('background-color', 'rgb(255, 232, 232)');
$("#alerts_options .email-alert").hide();
$("#alerts_options .keyword-alert").show();
$("#alerts_options .frequency-alert").show();
return false;
}//frequency empty, email on, kw on
if(frequency == 0 && email > 0 && keyword > 0){
$("#keywords").css('background-color', '#FFFFFF');
$("[name=email_address]").css('background-color', '#FFFFFF');
$("[name=frequency]").css('background-color', 'rgb(255, 232, 232)');
$("#alerts_options .email-alert").hide();
$("#alerts_options .keyword-alert").hide();
$("#alerts_options .frequency-alert").show();
return false;
}//frequency on, email on, kw empty
if(frequency > 0 && email > 0 && keyword == 0){
$("#keywords").css('background-color', 'rgb(255, 232, 232)');
$("[name=email_address]").css('background-color', '#FFFFFF');
$("[name=frequency]").css('background-color', '#FFFFFF');
$("#alerts_options .email-alert").hide();
$("#alerts_options .keyword-alert").show();
$("#alerts_options .frequency-alert").hide();
return false;
}
if(frequency > 0 && email == 0 && keyword > 0){
$("#keywords").css('background-color', '#FFFFFF');
$("[name=email_address]").css('background-color', 'rgb(255, 232, 232)');
$("[name=frequency]").css('background-color', '#FFFFFF');
$("#alerts_options .email-alert").show();
$("#alerts_options .keyword-alert").hide();
$("#alerts_options .frequency-alert").hide();
return false;
}
if(frequency == 0 && email == 0 && keyword > 0){
$("#keywords").css('background-color', '#FFFFFF');
$("[name=email_address]").css('background-color', 'rgb(255, 232, 232)');
$("[name=frequency]").css('background-color', 'rgb(255, 232, 232)');
$("#alerts_options .email-alert").show();
$("#alerts_options .keyword-alert").hide();
$("#alerts_options .frequency-alert").show();
return false;
}
if(frequency > 0 && email == 0 && keyword == 0){
$("#keywords").css('background-color', 'rgb(255, 232, 232)');
$("[name=email_address]").css('background-color', 'rgb(255, 232, 232)');
$("[name=frequency]").css('background-color', '#FFFFFF');
$("#alerts_options .email-alert").show();
$("#alerts_options .keyword-alert").show();
$("#alerts_options .frequency-alert").hide();
return false;
}
});
});
</script>
这是一件好事,你不需要在表单中添加其他输入或两个输入,因为你需要更多的'if'语句。 –
使用指数 http://stackoverflow.com/questions/143847/best-way-to-find-an-item-in-a-javascript-array –
我知道克里斯,它不会那么糟糕如果整个表格不包含必填字段,如果有更好的方法可以做到这一点,请随时提出建议,因为它不能很好地处理if语句的数量 –