菜鸟学习javascript实例教程(10)
2008-02-23 07:41:41来源：互联网 阅读 ()
http://www.altavista.com">AltaVista</option><option value="W3Schoolshttp://www.w3schools.com">W3Schools</option>
</select>
</form>
</body>
</html>
光标自动跳到下一个文本区
<html>
<head>
<script type="text/javascript">
function toUnicode(elmnt,content)
{
if (content.length==elmnt.maxLength)
{
next=elmnt.tabIndex
if (next<document.forms[0].elements.length)
{
document.forms[0].elements[next].focus()
}
}
}
</script>
</head>
<body>
<p>This script automatically jumps to the next input field when the current field's maxlength has been reached.</p>
<form>
<input size="3" tabindex="1" maxlength="3" onkeyup="toUnicode(this,this.value)">
<input size="3" tabindex="2" maxlength="3" onkeyup="toUnicode(this,this.value)">
<input size="3" tabindex="3" maxlength="3" onkeyup="toUnicode(this,this.value)">
</form>
</body>
</html>
Frame, Frameset 和 IFrame 对象
平分两个页面
<html>
<frameset id="myFrameset" cols="50%,50%">
<frame id="leftFrame" src="frame_a_noresize.htm">
<frame id="rightFrame" src="frame_a.htm">
</frameset>
</html>
<html>
<head>
<script type="text/javascript">
function disableResize()
{
parent.document.getElementById("leftFrame").noResize=true
parent.document.getElementById("rightFrame").noResize=true
}
function enableResize()
{
parent.document.getElementById("leftFrame").noResize=false
parent.document.getElementById("rightFrame").noResize=false
}
</script>
</head>
<body bgcolor="#EFE7D6">
<form>
<input type="button" onclick="disableResize()" value="No resize">
<input type="button" onclick="enableResize()" value="Resize">
</form>
<p>Try to resize the frame.</p>
<p>Right-click inside the two frames and select "View Source" to see the source code.</p>
</body>
</html>
是否显示滚动条
<html>
<frameset id="myFrameset" cols="50%,50%">
<frame id="leftFrame" src="frame_a_scrolling.htm">
<frame id="rightFrame" src="frame_a.htm">
</frameset>
</html>
<html>
<head>
<script type="text/javascript">
function enableScrolling()
{
parent.document.getElementById("leftFrame").scrolling="yes"
parent.document.getElementById("rightFrame").scrolling="yes"
}
function disableScrolling()
{
parent.document.getElementById("leftFrame").scrolling="no"
parent.document.getElementById("rightFrame").scrolling="no"
}
</script>
</head>
<body bgcolor="#EFE7D6">
<form>
<input type="button" onclick="enableScrolling()" value="Scroll bars">
<input type="button" onclick="disableScrolling()" value="No scroll bars">
</form>
<p>Right-click inside the frames and select "View Source" to see the source code.</p>
</body>
</html>
改变页面的地址：
<html>
<frameset id="myFrameset" cols="50%,50%">
<frame id="leftFrame" src="frame_a_src.htm">
<frame id="rightFrame" src="frame_a.htm">
</frameset>
</html>
<html>
<head>
<script type="text/javascript">
function newSrc()
{
parent.document.getElementById("leftFrame").src="default.asp"
parent.document.getElementById("rightFrame").src="http://www.w3schools.com"
}
</script>
</head>
<body bgcolor="#EFE7D6">
<form>
<input type="button" onclick="newSrc()" value="Change frame source">
</form>
<p>Right-click inside the two frames and select "View Source" to see the source code.</p>
</body>
</html>
跳出框架
<html>
<head>
<script type="text/javascript">
function breakout()
{
if (window.top!=window.self)
{
window.top.location="tryjs_breakout.htm"
}
}
</script>
</head>
<body>
<form>
Click the button to break out of the frame:
<input type="button" onclick="breakout()" value="Break out!">
</form>
</body>
</html>
更新两个页面
<html>
<frameset rows="25%,*" frameborder="1">
<frame name="upperframe" src="frame_a.htm">
<frame name="lowerframe" src="frames_sourcepage.htm">
</frameset>
</html>
<html>
<head>
<script type="text/javascript">
function changeurl()
{
parent.upperframe.location.href="frame_b.htm"
parent.lowerframe.location.href="frame_c.htm"
}
</script>
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