ctrlLeft参数属性

Sets or retrieves the state of the left CTRL key.

dhtml语法

event.ctrlLeft(v) [ = bPressed ]

DHTML可能的值

bPressed Boolean that specifies or receives one of the following values.
false Left CTRL key is not pressed.
true Left CTRL key is pressed.
The property is read/write. The property has no default value.
Expressions can be used in place of the preceding value(s), as of Microsoft® Internet Explorer 5. For more information, see about dynamic properties.

remarks

this property is currently supported only in microsoft® windows nt® 4.0 and microsoft windows® 2000.
the document must have focus for this property to return true.

DHTML代码范例

The following example shows how to use the ctrlLeft property to indicate when the user presses the left or right CTRL keys.

<HEAD>
<SCRIPT>
function init() {
spanLeftCtrl.innerText='false';
spanRightCtrl.innerText='false';
}
function indicate(obj, arg) {
obj.innerText=arg;
}
function CtrlDown() {
if (event.ctrlLeft) {
indicate(spanLeftCtrl,'true');
}
else {
if (event.ctrlKey) {
indicate(spanRightCtrl,'true');
}
}
}
function CtrlUp() {
if (!event.ctrlKey) {
indicate(spanLeftCtrl,'false');
indicate(spanRightCtrl,'false');
}
}
</SCRIPT>
</HEAD>
<BODY onload="document.body.focus(); init()" onkeydown="CtrlDown();" onkeyup="CtrlUp();">
<P>Press either the left or right CTRL key.</P>
<TABLE>
<TR>
<TD><I>Left CTRL Key Pressed</I></TD>
<TD><I>Right CTRL Key Pressed</I></TD>
</TR>
<TR>
<TD ALIGN="center"><SPAN ID="spanLeftCtrl"></SPAN></TD>
<TD ALIGN="center"><SPAN ID="spanRightCtrl"></SPAN></TD>
</TR>
</TABLE>
</P>
</BODY>

This feature requires Microsoft® Internet Explorer 5.5 or later. Click the following icon to install the latest version. Then reload this page to view the sample.

是否符合公共标准

There is no public standard that applies to this property.

Applies To

event

更多语法参考

ctrlKey