DOM Example var oHtml = document.documentElement; var oHead = oHtml.firstChild; var oBody = oHtml.lastChild; alertoHead.nodeName; //outputs “HEAD” alertoBody.parentNode == oHtml; //outp
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Trang 5<form name="myform" method="get">
< input type ="text" name ="ten" value ="Nhập tên"
onchange ="displayName(form.test.value)" />
</form>
</body>
</html>
Trang 6< script language = "JavaScript" type ="text/javascript">
color = new Array( "red" , "blue" , "green" )
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<các câu lệnh>;}
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objectName= new ObjectType(para1[,para2, );
< script language ="javascript" type ="text/javascript">
function employee(name, code) {
this name = name;
this code = code; }
"EM03");
document.write( "<br/> Họ tên:" + myemp.name);
document.write( "<br/> Mã nhân viên: " + myemp.code);
</ script >
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Trang 15<input type="text" name="txtR" />
<input type="button" name="cmdTinh" value="Tính" onclick="dientich(myform.txtR.value)"/>
<input type="text" name="txtKQ" />
</form>
</body>
</html>
Trang 19Trang 20<html>
<head>
<title>DOM Example</title>
<script type="text/javascript" language="javascript">
var oHtml = document.documentElement;
var oHead = oHtml.firstChild;
var oBody = oHtml.lastChild;
alert(oHead.nodeName); //outputs “HEAD”
alert(oBody.parentNode == oHtml); //outputs “true”
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< input type ="text" name ="txtBT" /> < br />
< input type ="button" name ="cmdTinh" value ="Tính"
Trang 30<head>
<title>DOM Example</title>
<script type="text/javascript" language="javascript">
if (num == "") {aler("Chưa điền số");
if (isNaN(num)) {alert("Phải điền số");
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