我创建了一个订单，如下所示，其中包含多个用于添加项目的复选框，现在我想在只有用户点击相关复选框时对禁用的项目进行验证，请帮助我更正以下代码。
<script language="JavaScript">
function check_box2(status)
{
status=!status;
document.orderform.item2.disabled = status;
document.orderform.qty2.disabled = status;
}
function check_box3(status)
{
status=!status;
document.orderform.item3.disabled = status;
document.orderform.qty3.disabled = status;
}
function check_box4(status)
{
status=!status;
document.orderform.item4.disabled = status;
document.orderform.qty4.disabled = status;
}
</script>
<script language="JavaScript" src="gen_validatorv4.js" type="text/javascript" ></script>
<body onload="check_box2(status); check_box3(status); check_box4(status);">
<form action="order.php" method="POST" name="orderform" id="orderform" onSubmit="return validation();">
<table>
<tr><td valign="top"> <p>Order Item 1 :</p> </td><td> <select id="item1" name="item1">
<option value="0" selected="selected"><p> [Select] </p></option>
<option value="1"> <p> Product 1 </p></option>
<option value="2"> <p> Product 2 </p> </option>
<option value="3"> <p> Product 3 </p> </option>
</select> </td>
<td valign="top"><p>Quantity :</p></td><td><input style="width:30px;" name="qty1" type="text"></td> </tr>
<tr><td valign="middle"><input type="checkbox" name="check2" onclick="check_box2(this.checked)" >Add Item 2 : </td><td> <select id="item2" name="item2">
<option value="0" selected="selected"><p> [Select] </p></option>
<option value="1"> <p> Product 1 </p></option>
<option value="2"> <p> Product 2 </p> </option>
<option value="3"> <p> Product 3 </p> </option>
</select> </td>
<td valign="top"><p>Quantity :</p></td><td><input style="width:30px;" name="qty2" type="text"></td> </tr>
<tr><td valign="middle"> <input type="checkbox" name="check3" onclick="check_box3(this.checked)" >Add Item 3 : </td><td> <select id="item3">
<option value="0" selected="selected"><p> [Select] </p></option>
<option value="1"> <p> Product 1 </p></option>
<option value="2"> <p> Product 2 </p> </option>
<option value="3"> <p> Product 3 </p> </option>
</select> </td>
<td valign="top"><p>Quantity :</p></td><td><input style="width:30px;" name="qty3" type="text"></td> </tr>
<tr><td valign="middle"> <input type="checkbox" name="check4" onclick="check_box4(this.checked)" >Add Item 4 : </td><td> <select id="item4">
<option value="0" selected="selected"><p> [Select] </p></option>
<option value="1"> <p> Product 1 </p></option>
<option value="2"> <p> Product 2 </p> </option>
</select> </td>
<td valign="top"><p>Quantity :</p></td><td><input style="width:30px;" name="qty4" type="text"></td> </tr>
</table>
<div><input name="submit" type="submit" value="Send"> </div>
</form>
<script type="text/javascript">
var frmvalidator = new Validator("orderform");
frmvalidator.addValidation("item1","dontselect=0", "Please select an item");
frmvalidator.addValidation("qty1","req","Please enter your quantity");
if (document.orderform.item2.checked==true)
{
frmvalidator.addValidation("item2","dontselect=0", "Please select an item2");
frmvalidator.addValidation("qty2","req","Please enter your quantity");
}
</script>
</body>
您只需添加一些条件：
if(document.getElementById('checkbox123').checked == true) {
// validate code here
}
你也可以这样做：
if(document.orderform.checkbox123.checked == true) {
// validate code here
}
能够使用包含在gen_validatorv4.js脚本中的VWZ_IsChecked（）函数进行验证
frmvalidator.addValidation("item2","dontselect=0", "Please select an item2",
"VWZ_IsChecked(document.forms['orderform'].elements['check2'],'check2')");
frmvalidator.addValidation("qty2","req","Please enter your quantity for item 2",
"VWZ_IsChecked(document.forms['orderform'].elements['check2'],'check2')");