<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> <script> window.onload = function (){ var oBtn = document.getElementById('btn1'); var oText = document.getElementById('text1'); var oSelect = document.getElementById('select1'); oBtn.onclick = function (){ alert(oText.value + ' 在 ' + oSelect.value); }; oBtn1.onclick = function (){ num -= 2; oP.style.fontSize = num + 'px'; // oP.style.font-Size,JS 不允许出现"-" // padding-top paddingTop // margin-left marginLeft }; oBtn3.onclick = function (){ // oP.class = 'red'; // class => className oP.className = 'red'; }; if( oImg.src == 'file:///C:/Users/Administrator/Desktop/11-4-JS1/img/1.jpg' ){ oImg.src = 'img/2.jpg'; } }; </script> <script> var oInp = document.getElementById('inp1'); oInp.onclick = function (){ oInp.type = 'checkbox'; // 咱们有仨位“祖宗” /* IE6 IE7 IE8 不支持 */ }; /* oDiv.style.float = 'right'; oDiv.style.styleFloat = 'right'; // IE oDiv.style.cssFloat = 'left'; // 非IE IE(styleFloat) 非IE(cssFloat) <div class="right"></div> */ </script> </head> <body> </body> </html>