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我正在尝试创建一个用户单击按钮并添加标签、输入和删除按钮的工具。我大部分时间都在工作，但只缺少几件事。如果用户假设添加了“4”项，他/她删除了“2”项；我希望标签值减去其值的“-1”，并希望该项目的 id 减去其值的“-1”。任何帮助，将不胜感激！

我在下面创建了一个 jsFiddle：

http://jsfiddle.net/ryanverdel/fUhL8/

HTML 

    <input type="input" value="0" id="theValue" />
    <div id="myDiv">
    </div>

Javascript

    function addItem() {

    if ($('#theValue').val() < 10){

    var ni = document.getElementById('myDiv');
    var numi = document.getElementById('theValue');
    var num = (document.getElementById('theValue').value -1)+ 2;
    numi.value = num;

    var newdiv = document.createElement('form');
    var newlabel = document.createElement('input');
    var newinput = document.createElement('input');
    var newbutton = document.createElement('input');
    var divIdName = 'Address'+num;
    newdiv.setAttribute('id',divIdName);
    newbutton.setAttribute('type','button');
    newbutton.setAttribute('onclick','onclick=confirmDelete("'+divIdName+'"); return false;');
    newbutton.setAttribute('value','Delete');
    //newlabel.innerHTML ='Address('+num+')';
    newlabel.setAttribute('value','Address '+num+':')
    newlabel.setAttribute('size','8');
    newlabel.setAttribute('class','label');
    newlabel.setAttribute('readonly','true');
    newinput.setAttribute('type','text');
    newinput.setAttribute('id',divIdName+'_input');
    ni.appendChild(newdiv);
    newdiv.appendChild(newlabel);
    newdiv.appendChild(newinput);
    newdiv.appendChild(newbutton);
    }

    else{
return false;
    };

    }

    function confirmDelete(divNum){
    if (confirm("Are you sure you want to delete " +divNum+"?")) 
{

var d = document.getElementById('myDiv');
    var olddiv = document.getElementById(divNum);
var getLabel = olddiv.getElementsByClassName("label");



var counter= $('#theValue').val();

$('#theValue').val( (counter-1<0)?counter:--counter );

//$(getLabel).nextAll().css( "color", "red" );

$(olddiv).nextAll().css('background-color', 'red').css('color','red');
d.removeChild(olddiv);

}
else{};
    }
4

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