我有一个带有动态输入字段的表单,用于插入数字,其中第一个输入是静态的,其他 5 个是用脚本动态生成的。最后一个字段是连接数字的总和。
<form class="form-horizontal" id="whereEntry" method='post' action=''>
<fieldset>
<div class="control-group">
<div class="controls controls-row">
<input type="text" class="span3 register_input" id="main_activity" name="main_activity" placeholder="Company's main activity">
<input type="text" class="span1 register_input income_count" id="income" name="income" placeholder="% of income">
</div>
</div>
<div class="control-group">
<div class="controls controls-row">
<div id="InputsIncomeWrapper">
</div>
</div>
<div class="row">
<input type="text" class="span1 register_input pull-right" id="income_sum" name="income_sum">
</div>
<div class="row">
<a href="#" id="AddMoreIncomeBox" class="btn btn-info pull-right"><i class="icon-plus"></i>Add More</a>
</div>
</div>
</fieldset>
</form>
总和脚本:
//calculation script
var $form = $('#whereEntry'),
$sumDisplay = $('#income_sum');
$form.delegate('.income_count', 'change', function ()
{
var $summands = $form.find('.income_count');
var sum = 0;
$summands.each(function ()
{
var value = Number($(this).val());
if (!isNaN(value)) sum += value;
});
$sumDisplay.val(sum);
});
动态字段脚本:
//add dynamic field script
$(document).ready(function() {
var MaxInputs = 5; //maximum input boxes allowed
var InputsWrapper = $("#InputsIncomeWrapper"); //Input boxes wrapper ID
var AddButton = $("#AddMoreIncomeBox"); //Add button ID
var x = InputsWrapper.length; //initlal text box count
var FieldCount=1; //to keep track of text box added
$(AddButton).click(function (e) //on add input button click
{
if(x <= MaxInputs) //max input box allowed
{
FieldCount++; //text box added increment
//add input box
$(InputsWrapper).append('\
<div>\
<input type="text" class="register_input span3"\
name="main_activity_'+ FieldCount +'" id="main_activity_'+ FieldCount +'"\
placeholder="Company´s other activity" style="margin:0px 15px 20px 0px"/>\
<input type="text" class="span1 register_input income_count" id="income_'+ FieldCount +'"\
name="income_'+ FieldCount +'" placeholder="% of income"\ style="margin:0px 15px 20px 15px"/>\
<a href="#" class="removeclass pull-left"><i class="icon-remove icon-remove-addincome"></i></a></div>');
x++; //text box increment
}
return false;
});
$("body").on("click",".removeclass", function(e){ //user click on remove text
if( x > 1 ) {
$(this).parent('div').remove(); //remove text box
x--; //decrement textbox
}
return false;
})
});
这是关于 jsfiddle 的示例:http: //jsfiddle.net/Uwbe6/2/
现在一切正常,但是例如,当我添加两个动态字段时,我在第一个静态中输入 30,在第二个动态中输入 40,在第三个动态中输入 30。#income_sum 中的值是 100。但如果我改变主意并“关闭”两个动态字段。问题是我的总和值不会恢复到仅从第一个字段中提取的 40。它保持 100。有什么不难的解决方案吗?在 .income_count 删除时使用 .change() 的东西?