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Converted to HTML in WebWorks Publisher 2000. manual wdt 1.5"> <META NAME="LASTUPDATED" CONTENT="09/28/00 13:15:49"> <TITLE> Core JavaScript Reference 1.5: </TITLE></HEAD><BODY TEXT="#000000" LINK="#666699" VLINK="#666699" ALINK="#333366" BGCOLOR="#FFFFFF"><MAINCONTENT><NAVIGATIONCONTENT> <TABLE WIDTH="100%" BORDER="0" CELLSPACING="4"> <TR> <TD VALIGN="TOP"> <b><a href="number.htm"><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Previous</a></FONT> </b><a href="contents.htm"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Contents</a></FONT></b> <a href="ix.htm"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Index</a></FONT></b> <a href="packages.htm"><b><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2" COLOR="#993300">Next</a></FONT></b> </TD> </TR> <TR> <TD VALIGN="TOP" ALIGN="RIGHT" BGCOLOR="#CCCCCC"> <FONT FACE="Arial, Helvetica, sans-serif" COLOR="#000000" SIZE="2"><B> Core JavaScript Reference 1.5</B></FONT> </TD> </TR> <TR> </TABLE> <BR></NAVIGATIONCONTENT><BOOKCONTENT> <blockquote><BR><BR> <BR><BR><P><A NAME="1193136"> </A><A NAME="Object"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="5"><B><zrefhead1>Object</zrefhead1></B></FONT><P><A NAME="1193137"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph><FONT FACE="courier, couriernew, monospaced size">Object</FONT> is the primitive JavaScript object type. All JavaScript objects are descended from <FONT FACE="courier, couriernew, monospaced size">Object</FONT>. That is, all JavaScript objects have the methods defined for <FONT FACE="courier, couriernew, monospaced size">Object</FONT>. <BR><P><TABLE WIDTH="90%" BORDER="1" CELLPADDING="5" CELLSPACING="0"> <CAPTION></CAPTION><P><FONT FACE=""><B></B></FONT><BR><BR> <TR> <TD VALIGN=TOP COLSPAN=2 ROWSPAN=1><P><A NAME="1193140"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext><I>Core object</I></ztabletext></FONT></TD> </TR> <TR> <TD VALIGN=TOP><P><A NAME="1193144"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext><I>Implemented in</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1193146"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext>JavaScript 1.0: <FONT FACE="courier, couriernew, monospaced size">toString</FONT> method.</ztabletext></FONT><P><A NAME="1195549"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext></ztabletext></FONT><P><A NAME="1195550"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext>JavaScript 1.1, NES 2.0: added <FONT FACE="courier, couriernew, monospaced size">eval</FONT> and <FONT FACE="courier, couriernew, monospaced size">valueOf</FONT> methods; <FONT FACE="courier, couriernew, monospaced size">constructor</FONT> property.</ztabletext></FONT><P><A NAME="1195551"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext></ztabletext></FONT><P><A NAME="1195552"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext>JavaScript 1.2: deprecated <A HREF="object.html#1194118" >eval</A> method.</ztabletext></FONT><P><A NAME="1193150"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext></ztabletext></FONT><P><A NAME="1195553"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext>JavaScript 1.3: added <A HREF="object.html#1193320" >toSource</A> method.</ztabletext></FONT><P><A NAME="1203643"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext></ztabletext></FONT><P><A NAME="1203640"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext>JavaScript 1.4: removed <A HREF="object.html#1194118" >eval</A> method.</ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><P><A NAME="1196451"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext><I>ECMA version</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1196453"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><ztabletext>ECMA-262</ztabletext></FONT> </TD> </TR></TABLE><P></zparagraph></FONT><P><BR><A NAME="1193151"> </A><A NAME="Created by"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><B><zrefheader>Created by</zrefheader></B></FONT><BR><A NAME="1193152"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>The <FONT FACE="courier, couriernew, monospaced size">Object</FONT> constructor:</zparagraph></FONT><P><A NAME="1193153"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline>new Object()</zcodeline></FONT><P><BR><A NAME="1193154"> </A><A NAME="Parameters"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><B><zrefheader>Parameters</zrefheader></B></FONT><BR><A NAME="1193155"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>None</zparagraph></FONT><P><BR><A NAME="1193156"> </A><A NAME="Property Summary"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><B><zrefheader>Property Summary</zrefheader></B></FONT><BR><A NAME="1193176"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph><BR><P><TABLE WIDTH="90%" BORDER="1" CELLPADDING="5" CELLSPACING="0"> <CAPTION></CAPTION><P><FONT FACE=""><B></B></FONT><BR><BR> <TR BGCOLOR="#CCCCCC" ALIGN=LEFT VALIGN=TOP> <TH VALIGN=TOP ALIGN=LEFT><A NAME="1193159"> </A><P ALIGN="LEFT"><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><B><ztablehead>Property</ztablehead></B></FONT></TH> <TH VALIGN=TOP ALIGN=LEFT><A NAME="1193161"> </A><P ALIGN="LEFT"><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><B><ztablehead>Description</ztablehead></B></FONT></TH> </DIV></TR> <TR> <TD VALIGN=TOP><A NAME="1193166"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline><A HREF="object.html#1193229" >constructor</A></zcodeline></FONT><P> </TD> <TD VALIGN=TOP><P><A NAME="1193168"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>Specifies the function that creates an object's prototype.</ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><A NAME="1193173"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline><A HREF="object.html#1193255" >prototype</A></zcodeline></FONT><P> </TD> <TD VALIGN=TOP><P><A NAME="1193175"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>Allows the addition of properties to all objects.</ztabletext></FONT> </TD> </TR></TABLE><P></zparagraph></FONT><P><BR><A NAME="1193177"> </A><A NAME="Method Summary"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><B><zrefheader>Method Summary</zrefheader></B></FONT><BR><A NAME="1193225"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph><BR><P><TABLE WIDTH="90%" BORDER="1" CELLPADDING="5" CELLSPACING="0"> <CAPTION></CAPTION><P><FONT FACE=""><B></B></FONT><BR><BR> <TR BGCOLOR="#CCCCCC" ALIGN=LEFT VALIGN=TOP> <TH VALIGN=TOP ALIGN=LEFT><A NAME="1193180"> </A><P ALIGN="LEFT"><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><B><ztablehead>Method</ztablehead></B></FONT></TH> <TH VALIGN=TOP ALIGN=LEFT><A NAME="1193182"> </A><P ALIGN="LEFT"><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><B><ztablehead>Description</ztablehead></B></FONT></TH> </DIV></TR> <TR> <TD VALIGN=TOP><A NAME="1193187"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline><A HREF="object.html#1194118" >eval</A></zcodeline></FONT><P> </TD> <TD VALIGN=TOP><P><A NAME="1193189"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>Deprecated. Evaluates a string of JavaScript code in the context of the specified object.</ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><A NAME="1193194"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline><A HREF="object.html#1193320" >toSource</A></zcodeline></FONT><P> </TD> <TD VALIGN=TOP><P><A NAME="1193196"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>Returns an object literal representing the specified object; you can use this value to create a new object.</ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><A NAME="1193201"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline><A HREF="object.html#1193350" >toString</A></zcodeline></FONT><P> </TD> <TD VALIGN=TOP><P><A NAME="1193203"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>Returns a string representing the specified object.</ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><A NAME="1193208"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline><A HREF="object.html#1193499" >unwatch</A></zcodeline></FONT><P> </TD> <TD VALIGN=TOP><P><A NAME="1193210"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>Removes a watchpoint from a property of the object.</ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><A NAME="1193215"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline><A HREF="object.html#1193540" >valueOf</A></zcodeline></FONT><P> </TD> <TD VALIGN=TOP><P><A NAME="1193217"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>Returns the primitive value of the specified object.</ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><A NAME="1193222"></A><FONT FACE="courier, couriernew, monospaced size" SIZE="-1"><zcodeline><A HREF="object.html#1193628" >watch</A></zcodeline></FONT><P> </TD> <TD VALIGN=TOP><P><A NAME="1193224"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>Adds a watchpoint to a property of the object.</ztabletext></FONT> </TD> </TR></TABLE><P></zparagraph></FONT><P><BR><P><A NAME="1193229"> </A><A NAME="constructor"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="4"><B><zrefhead2>constructor</zrefhead2></B></FONT><P><A NAME="1193230"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="2"><zparagraph>Specifies the function that creates an object's prototype. Note that the value of this property is a reference to the function itself, not a string containing the function's name.<BR><P><TABLE WIDTH="90%" BORDER="1" CELLPADDING="5" CELLSPACING="0"> <CAPTION></CAPTION><P><FONT FACE=""><B></B></FONT><BR><BR> <TR> <TD VALIGN=TOP><P><A NAME="1193233"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext><I>Property of</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1193238"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext><A HREF="object.html#1193136" >Object</A></ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><P><A NAME="1193240"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext><I>Implemented in</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1193242"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>JavaScript 1.1, NES 2.0</ztabletext></FONT> </TD> </TR> <TR> <TD VALIGN=TOP><P><A NAME="1196460"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext><I>ECMA version</I></ztabletext></FONT> </TD> <TD VALIGN=TOP><P><A NAME="1196462"> </A><FONT FACE="Arial, Helvetica, sans-serif" SIZE="-1"><ztabletext>ECMA-262</ztabletext></FONT> </TD> </TR></TABLE><P></zparagraph></FONT><P><BR>⌨️ 快捷键说明
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