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我有一个hdden div机智选择它里面。我想在div显示时设置必要的属性。如何在隐藏div显示时设置必需的属性?
function showHide(elem) {
if (elem.selectedIndex !== -1) {
//get the divs to show/hide
divsO = document.getElementById("frmRegister").getElementsByTagName('div');
//hide the divs
for (var i = 0; i < divsO.length; i++) {
divsO[i].style.display = 'none';
}
//unhide the selected div
var elems = document.getElementsByClassName('div' + elem.value);
for (i = 0; i < elems.length; i++) {
elems[i].style.display = 'block';
document.getElementsByClassName(elems[i]).getElementsByTagName('select')[0].required = true;
}
prices();
}
}