border-top-width Attribute | borderTopWidth参数属性

Sets or retrieves the width of the top border of the object.

dhtml语法

HTML { border-top-width : sWidth }
Scripting object.style.borderTopWidth [ = sWidth ]

DHTML可能的值

sWidth Variant that specifies or receives one of the following values.
medium Default. ?/TD>
thin Less than the default width.
thick Greater than the default width.
width Floating-point number, followed by an absolute units designator (cm, mm, in, pt, pc, or px) or a relative units designator (em or ex). For more information about the supported length units, see CSS Length Units Reference.
The property is read/write for all objects except the following, for which it is read-only: currentStyle. The property has a default value of medium. The Cascading Style Sheets (CSS) attribute is not inherited.
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

as of microsoft® internet explorer 5.5, this property applies to inline elements. with earlier versions of internet explorer, inline elements must have an absolute?a href="../properties/position.html">position or layout to use this property. element layout is set by providing a value for the height property or the width property.

Examples

The following examples use the border-top-width attribute and the borderTopWidth property to specify the width of the top border.
This example uses a call to an embedded (global) style sheet to change the width of the top border to 1 centimeter when a mouse click occurs.
<HEAD>
<STYLE>
TD { border-top-width:3mm }
.changeborder1 { border-top-width:1cm }
</STYLE>
</HEAD>
<BODY>
<TABLE BORDER>
<TR>
<TD onclick="this.className='changeborder1'"
ondblclick="this.className=''">
<IMG src="sphere.jpg">
</TD>
</TR>
</TABLE>
This feature requires Microsoft® Internet Explorer 4.0 or later. Click the following icon to install the latest version. Then reload this page to view the sample.
This example uses inline script to change the width of the top border to 1 centimeter when a mouse click occurs.
<TD onclick="this.style.borderTopWidth='1cm'">
This feature requires Microsoft® Internet Explorer 4.0 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

This property is defined in Cascading Style Sheets (CSS), Level 1 (CSS1) .

Applies To

A, ACRONYM, B, BDO, BIG, BLOCKQUOTE, BODY, BUTTON, CAPTION, CENTER, CITE, CODE, currentStyle, CUSTOM, DD, defaults, DEL, DFN, DIR, DIV, DL, DT, EM, EMBED, FIELDSET, FONT, FORM, FRAME, hn, HR, I, IFRAME, IMG, INPUT type=button, INPUT type=checkbox, INPUT type=file, INPUT type=image, INPUT type=password, INPUT type=radio, INPUT type=reset, INPUT type=submit, INPUT type=text, INS, ISINDEX, KBD, LABEL, LI, LISTING, MARQUEE, MENU, NOBR, OBJECT, OL, P, PLAINTEXT, PRE, Q, runtimeStyle, S, SAMP, SMALL, SPAN, STRIKE, STRONG, style, SUB, SUP, TABLE, TD, TEXTAREA, TH, TT, U, UL, VAR, XMP

更多语法参考

border, CSS Enhancements in Internet Explorer 6