Artikel ini menjelaskan bagaimana JS hanya menetapkan nilai default dari kotak pemilihan drop-down. Bagikan untuk referensi Anda, sebagai berikut:
// secara default pemilihan catatan yang sesuai dengan fungsi latar belakang setSelectOption (objselect, targetValue) {if (objselect) {var options = objselect.options; if (options) {var len = options.length; untuk (var i = 0; i <len; i ++) {if (options [i] .value == targetValue) {option [i] .defaultSelected = true; Opsi [i] .SPESTED = true; Kembali Benar; }}} else {alert ('Missing Element (S)!'); }} else {alert ('Missing Element (S)!'); }} else {alert ('Missing Element (S)!'); }}For more information about JavaScript related content, please check out the topics of this site: "Summary of JavaScript Search Algorithm and Skills", "Summary of JavaScript Data Structure and Algorithm and Skills", "Summary of JSON Operation Skills in JavaScript", "Summary of JavaScript Switching Special Effects and Skills", "Summary of JavaScript Animation Special Effects and Skills", "Summary of JavaScript Errors and Keterampilan Debugging "dan" Ringkasan Penggunaan Operasi Matematika JavaScript "
Saya harap artikel ini akan membantu pemrograman JavaScript semua orang.