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javascript - 放置在 head 标记中时 Jquery 代码不起作用

转载 作者:行者123 更新时间:2023-11-30 09:45:27 26 4
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<分区>

我有一些 jquery 代码,当放在 head 标签内时不起作用,但放在 body 标签后时有效。即使它在 document.ready() 中,它也不起作用。

这是我的代码:

$(document).ready(function() {
for (i = 1950; i <= new Date().getFullYear(); i++) {
$('#from').append($('<option />').val(i).html(i));
$('#to').append($('<option />').val(i).html(i));
}
})

这是我的结构

 < head>

<script type="text/javascript" src="scripts/jquery/js/jquery-1.4.2.min.js"></script>

<script type="text/javascript" src="scripts/jquery/js/jquery-ui-1.8.17.custom.min.js"></script>

<script type="text/javascript" src="/easyoffice/js/excelExport.js"></script>
<script type="text/javascript" src="/easyoffice/js/tinytable.js"></script>

<script type="text/javascript">
$(document).ready(function() {
for (i = 1950; i <= new Date().getFullYear(); i++) {
$('#from').append($('<option />').val(i).html(i));
$('#to').append($('<option />').val(i).html(i));

}

})
function checkyear() {
var from = $('select[id=to]').val();
var to = $('select[id=from]').val();
if (from == 'Select' || to == 'Select') {
alert(" Please Select an Year ")
return false;
} else if (from <= to) {

alert(" Please Select an Year greater than From Year ")
$("select#to").prop('selectedIndex', 0);

return false;
} else {
return true;
}
}

</script>
</head>

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