Use form select control to trigger the action

   

<HTML>
<BODY>
<FORM name="f1"> 
<SELECT name="s1"> 
<OPTION SELECTED value="http://www.java2s.com">Java2s.com
<OPTION value="http://www.google.com">Google
<OPTION value="http://www.msn.com">msn
<OPTION value="http://www.perl.com">Perl.com
<OPTION value="http://www.php.net">Php.net
</SELECT> 
<INPUT type="button" name="go" value="Go!" onClick="window.location=document.f1.s1.options[document.f1.s1.selectedIndex].value">
</FORM> 
<P>
<FORM name="f2"> 
<SELECT name="s2" onChange="window.location=document.f2.s2.options[document.f2.s2.selectedIndex].value"> 
<OPTION SELECTED value="http://www.java2s.com">Java2s.com
<OPTION value="http://www.google.com">Google
<OPTION value="http://www.msn.com">msn
<OPTION value="http://www.perl.com">Perl.com
<OPTION value="http://www.php.net">Php.net
</SELECT> 
</FORM> 

</BODY>

</HTML>

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Use form select control to trigger the action : Form Submit « Form Control « JavaScript DHTML

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