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当我点击调用JavaScript进行验证的按钮时,出现以下错误。奇怪的是,一切都在以前工作,但我现在不是这样。如果我选择忽略这个错误:错误:'0.type'为空或者不是javascript中的对象
Error: '0.type' is null or not an object
然后代码工作正常,但我第一次得到了错误,那么就问我,如果我想调试它,如果我选择否,则该代码工作正常。请帮忙。感谢 似乎代码停止在这一行:
if (areas[0].type == "textarea") {
但这里是我的全部代码:
<script type ="text/javascript">
function Validate_1() {
var flag = false;
var gridView = document.getElementById('<%= GridView1.ClientID %>');
for (var i = 1; i < gridView.rows.length; i++) {
var selects = gridView.rows[i].getElementsByTagName('select');
//var inputs = gridView.rows[i].getElementsByTagName('input');
var areas = gridView.rows[i].getElementsByTagName('textarea');
if (selects != null && areas != null) {
if (areas[0].type == "textarea") {
var txtval = areas[0].value;
var selectval = selects[0].value;
if (selectval == "No" && (txtval == "" || txtval == null)) {
flag = false;
break;
}
else {
flag = true;
document.getElementById('<%=btnSubmit.ClientID%>').style.visibility = 'visible';
}
}
}
}
if (!flag) {
alert('Please note that comments are required if you select "No" from the dropdown box. Thanks');
document.getElementById('<%=btnSubmit.ClientID%>').style.visibility = 'hidden';
// areas[i].focus();
// areas.[i].style.backgroundColor = "red";
}
return flag;
}
// document.getElementById('<%=btnSubmit.ClientID%>').style.visibility = 'visible';
</script>