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我有一个表单,通过javascript添加了一个复选框,当表单被提交时,它检查复选框是否被勾选。这在Firefox或Chrome中运行良好,但在IE7或8中会导致错误document.myform.mycheckbox.checked为空或不是对象。Javascript对象为空或不在IE中的对象
var checkbox = document.createElement("input");
checkbox.type = "checkbox";
checkbox.name = "mycheckbox";
checkbox.value= 291;
var div = document.getElementById("addcb");
div.appendChild(checkbox);
checkbox.checked = false;
在形式标签我的onSubmit =“返回CheckForm();”,其工作在Firefox或Chrome确定,但在IE7或8它提交表单,而不检查的形式,或者其它形式的对象。
if (document.myform.mycheckbox.checked == false){
errorMsg += "\n\tAgree \t- Please Click I Agree Checkbox";
}
//If there is aproblem with the form then display an error
if ((errorMsg != "") || (errorMsgLong != "")){
msg = "_______________________________________________________________\n\n";
msg += "The form has not been submitted because there are problem(s) with the form.\n";
msg += "Please correct the problem(s) and re-submit the form.\n";
msg += "_______________________________________________________________\n\n";
msg += "The following field(s) need to be corrected: -\n";
errorMsg += alert(msg + errorMsg + "\n" + errorMsgLong);
return false;
}
return true;
我用的开发工具来创建一个Brakpoint该报告错误:在创建它
document.myform.mycheckbox.checked is null or not an object
仍返回为空或不是一个对象在IE7/8中提交表单 – user2895984
document.getElementById(“mycheckbox”)。getAttribute('checked')'? –
啊,成功了。感谢那。 – user2895984