使用js给页面元素添加样式-CFANZ编程社区

使用js给页面元素添加样式

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Welcome!</title>
    <script type="text/javascript" language="Javascript">
        
       addOnload(initOne);
        addOnload(initTwo);
        addOnload(initThree);

        function addOnload(newFunction) {
            var oldOnload = window.onload;
            
            //如果加载的类型是function则加载该oldOnload否则加载新的function 
            if (typeof oldOnload == "function") {
                window.onload = function() {

                    if (oldOnload) {
                        oldOnload();
                    }

                    newFunction();
                }
            }
            else {

                window.onload = newFunction;
            } 
        }

        function initOne() {

            //给页面元素添加样式
            document.getElementById("pageBody").style.backgroundColor = "#ccc";
        }

        function initTwo() {

            //给页面元素添加样式
            document.getElementById("pageBody").style.color = "#FF0000";
        }

        function initThree() {
            var allTags = document.getElementsByTagName("*");

            for (var i=0; i<allTags.length; i++) {
                if (allTags[i].nodeName == "H1") {
                    allTags[i].style.border = "5px green solid";
                    allTags[i].style.padding = "25px";
                    allTags[i].style.backgroundColor = "#FFFFFF";
                }
            }
        }

    </script>
</head>
<body id="pageBody">
    <h1>Welcome to our Web site!</h1>
</body>
</html>