摘要： 
1.表单验证 function validateForm() { var name = document.forms["myForm"]["name"].value; if (name == "") { alert("Name must be filled out"); return false; 阅读全文
1.表单验证 function validateForm() { var name = document.forms["myForm"]["name"].value; if (name == "") { alert("Name must be filled out"); return false; 阅读全文
摘要： 
var box = document.createElement("div"); document.body.appendChild(box); for (let i = 0; i < 9; i++) { var p = document.createElement("p"); box.append 阅读全文
var box = document.createElement("div"); document.body.appendChild(box); for (let i = 0; i < 9; i++) { var p = document.createElement("p"); box.append 阅读全文