<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>document对象</title> </head> <body> <div id="me"> <b>试试吧</b> </div> <script> /*var a=document.getElementById("me"); a.innerHTML="<font color=red >hello world</font>"; alert(a.innerText);*/ </script> <form name="" id="f1"> <input type="text" id="f1" value="你好"> </form> <script> /* var t=document.getElementById("t1") alert(t.value);*/ </script> <font id="f1" > 获取属性的值,并更改属性. </font> <script> /* var x=document.getElementById("f1"); x.setAttribute("color","red");//设置一个属性,添加或更改都可以. */ </script> <form> 中华民国成立于哪一年? <input type="text" daan="1912" value="" id="t1" name="t1"/> <input type="button" onclick="check()" id="t2" name="t2" value="检查答案是否正确"/> </form> <script> function check() { var a=document.getElementById("t1"); var a1=a.value; a.setAttribute("daan","1912年"); //更改某一属性的值 var a2=a.getAttribute("daan");//获取某一属性的值 if(a1==a2) { alert("恭喜你答对了.") } else { alert("fool"); } } </script> <form> <input type="submit" id="b1" name="b1" value="同意(9)" disabled="disabled"/> </form> <script> var n=10; var a=document.getElementById("b1"); function bian() { n--; if(n==0) { a.removeAttribute("disabled"); a.value="同意"; } else { a.value="同意("+n+")"; window.setTimeout("bian()",1000) } } window.setTimeout("bian()",1000); </script> </body> </html>