removeExpression Method

Removes the expression from the specified property.

dhtml语法

bSuccess = object.removeExpression(sPropertyName)

Parameters

sPropertyName

Required. Stringthat specifies the name of the property from which to remove an expression.

Return Value

Returns one of the following possible values:

true	The expression was successfully removed.
false	The expression was not removed.

Remarks

After the expression is removed from the specified property, the value of the property equals the last computed value of the expression. To remove expressions set by the setexpression method, use removeexpression.

the following syntax sections show how to remove an expression from supported cascading style sheets (css) attributes and DHTML Properties.

• Use this syntax to remove an expression from a read/write property or from an expando property.

  object.removeexpression(spropertyname)

• use this syntax to remove an expression from a css attribute.

  object.style.removeexpression(spropertyname)

DHTML代码范例

This example uses the removeExpression method to remove an expression from the width property of a blue box.

<INPUT TYPE=text ID=oBox1 value=40>The sum of the values in these two text boxes determines the width <BR><INPUT TYPE=text ID=oBox2 value=40>of the blue text box below.
<BR><INPUT TYPE=text ID=oBox3 STYLE="background-color:blue">
<BR><BR><INPUT TYPE=button ID=Button1
value="Step 1: Get expression" onclick="getexp()">
<INPUT TYPE=button ID=Button2 value="Step 2: Remove expression"
onclick="remexp()">
<INPUT TYPE=button ID=Button3 value="Step 3: Get expression again"
onclick="getexp()">
<BR>
<HR>
<BR>
Right-click anywhere on this page to view the source code.
<SCRIPT>
var s;
var b;
oBox3.style.setExpression("width","eval(oBox1.value) +
eval(oBox2.value)","jscript");
function getexp()
{
s=oBox3.style.getExpression("width");
alert("Expression for the width of the blue box is \n\n" + s +
"\n\nThe width property has a value of " + oBox3.style.width);
}
function remexp()
{
b = oBox3.style.removeExpression("width");
alert("Expression removed successfully? \n" + b);
}
</SCRIPT>

This feature requires Microsoft® Internet Explorer 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 method.

Applies To

A, ACRONYM, ADDRESS, APPLET, AREA, B, BDO, BIG, BLOCKQUOTE, BODY, BR, BUTTON, CAPTION, CENTER, CITE, CODE, COL, COLGROUP, CUSTOM, DD, DEL, DFN, DIR, DIV, DL, DT, EM, EMBED, FIELDSET, FONT, FORM, hn, HR, I, IFRAME, IMG, INPUT type=button, INPUT type=checkbox, INPUT type=file, INPUT type=hidden, INPUT type=image, INPUT type=password, INPUT type=radio, INPUT type=reset, INPUT type=submit, INPUT type=text, INS, KBD, LABEL, LEGEND, LI, LISTING, MARQUEE, MENU, NOBR, OBJECT, OL, OPTION, P, PRE, Q, RT, RUBY, runtimeStyle, S, SAMP, SELECT, SMALL, SPAN, STRIKE, STRONG, style, SUB, SUP, TABLE, TBODY, TD, TEXTAREA, TFOOT, TH, THEAD, TR, TT, U, UL, VAR

更多语法参考

about dynamic properties, getexpression, recalc