javascript - 使用 case 语句启用/禁用按钮

Question

Hello, need help pleaseI already tried adding a break on both end of condition ..I Have 5 Textboxes, 1 Button and a Javascript for their function. What i want to do is this..

情况1:当Stat变量的值为“N”时，程序必须要求输入Area、Capital和Code，ADD按钮才能启用，否则它将禁用。

情况 2 当 Stat 变量的值为“R”时，程序必须要求在“面积”、“总面积”和“代码”文本框中输入 ADD 按钮才能启用，否则它将禁用。我尝试过以这种方式编写代码..但它不起作用。

function SetButtonStatus() {

        var Stat = document.getElementById('<%=_oTextBoxNRC.ClientID%>').value;
        var Area = document.getElementById('<%=_oTextBoxArea.ClientID%>').value;
        var Capital = document.getElementById('<%=_oTextBoxCapital.ClientID%>').value;
        var Code = document.getElementById('<%= _oTextboxBusLineCode.ClientID%>').value;
        var Gross = document.getElementById('<%=_oTextBoxGrossRec.ClientID%>').value;
        //Change these conditions as your requirement

        switch (Stat) {

            case 'N':

                if (parseFloat(Area) >= 1 && parseFloat(Capital) >= 1 && Code.length >= 1)
                    document.getElementById('<%=_oButtonAdd.ClientID%>').disabled = false;
                else
                    document.getElementById('<%=_oButtonAdd.ClientID%>').disabled = true;
                break;
            case 'R':

                if (parseFloat(Area) >= 1 && parseFloat(Gross) >= 1 && Code.length >= 1)
                    document.getElementById('<%=_oButtonAdd.ClientID%>').disabled = false;
                else
                    document.getElementById('<%=_oButtonAdd.ClientID%>').disabled = true;
                break;
        }

    }

Answer 1

像这样使用setAttribute和removeAttribute:

 if (parseFloat(Area) >= 1 && parseFloat(Capital) >= 1 && Code.length >= 1)
 {
     document.getElementById('<%=_oButtonAdd.ClientID%>')
         .setAttribute("disabled","disabled");
 }
 else
 {
     document.getElementById('<%=_oButtonAdd.ClientID%>')
         .removeAttribute('disabled');
 }