HTML
document.getElementById() html.ug5g.com My id = div1
document.getElementsByName() <div name="Name"></div> <p name="Name"></p> <span name="Name"></span> <h1 name="Name"></h1>
document.getElementsByClassName() <div class="CLASS"></div> <p class="CLASS"></p> <span class="CLASS"></span> <h1 class="CLASS"></h1>
document.getElementsByTagName() <span>11</span> <span>22</span> <span>33</span> <span>44</span>
1234.123456789.toFixed(0) = 1234.123456789.toFixed(2) = 1234.123456789.toFixed(5) = 1234.123456789.toFixed(30) =
element.setAttribute(string name, string value) string name 名稱和值的新屬性。 string value 屬性設定為指定的值。 example : div1.setAttribute("align", "center") div1.setAttribute("id", "div2") input.setAttribute("type", "button") img.setAttribute("src", "yy.jpg") 相關 : getAttribute() hasAttribute() removeAttribute()