1 <HTML> 2 <HEAD> 3 <TITLE>JavaScript Example: Boolean object</TITLE> 4 </HEAD> 5 <BODY BGCOLOR="#FFFFFF"> 6 7 <SCRIPT LANGUAGE="JavaScript1.1"> 8 9 with ( document ) { 10 write("To create a Boolean object"); 11 writeln(" with initial value <STRONG>false</STRONG>, use:<P>"); 12 writeln("<UL>"); 13 if ( ! new Boolean() ) { 14 write("<LI><TT>new Boolean()</TT><P>"); 15 } 16 if ( ! new Boolean(0) ) { 17 write("<LI><TT>new Boolean(0)</TT><P>"); 18 } 19 if ( ! new Boolean(null) ) { 20 write("<LI><TT>new Boolean(null)</TT><P>"); 21 } 22 if ( ! new Boolean("") ) { 23 write('<LI><TT>new Boolean("")</TT><P>'); 24 } 25 if ( ! new Boolean(false) ) { 26 write("<LI><TT>new Boolean(false)</TT><P>"); 27 } 28 writeln("</UL>"); 29 writeln("or simply write"); 30 writeln("<PRE> var myBoolean = false;</PRE>"); 31 write("All other values create a Boolean object"); 32 writeln(" with initial value <STRONG>true</STRONG>!"); 33 } 34 35 </SCRIPT> 36 37 </BODY> 38 </HTML>