$Web Selp

Build select options from global select element, selected from parameters

$Web_Selp inserts into the Web output stream the options list of an HTML select element. The options list is taken from a global select element created by $Web_Save_Sel, and the selected options (that is, the ones that are highlighted on the HTML page) are identified by values of a form and/or isindex parameter in the current web request. An overview of the $Web_Sel* functions is provided in "$Web_Sel* functions".

$Web_Selp takes three arguments and returns a string; for some types of errors, the current User Language request is cancelled. $Web_Selp is a callable $function.

Syntax

%rc = $Web_Selp(global_name, [param_name], [option_keywords])

%rc	A numeric variable to contain the return code.
global_name	The name of the global select element containing the values and descriptions for the options list. The global select element with this name must have been created by $Web_Save_Sel. This is a required argument.
param_name	The name of a form and/or an index parameter in the current web request. For each occurrence of this parameter, if it has a value that is equal to the value of an item in the options list, that option element is selected in the displayed options list. This allows multiple items to be selected, which is useful for <select multiple> elements. This an optional argument. If this argument is omitted, or if no occurrences of the parameter are equal to the value of any of the options in the global select element, then none of the option elements in the list contain the selected attribute. As explained in "Drop-down lists: HTML <select>", the default selected option depends on the type of select element: <select multiple> has no default; for non-multiple, the first item in the options list is the default selected element.
option_keywords	This optional argument is a string of blank-separated keywords specifying special processing for this $function; it can contain any of the following: NOCAN Don't cancel request if global select element global_name not found NOFORM Don't look in form parameters NOISINDEX Don't look in isindex parameters NOISI Synonym for NOISINDEX NOENDSEL Don't end list of options with </select> NOENDS Synonym for NOENDSEL ENDOPT End each option with </option>

These are the $Web_Selp return values:

Code	Meaning
null	The operation completed successfully.
"1"	global_name not a saved global select element, and NOCAN option specified.
	Any other error results in cancellation of the User Language request.

See "$Web_Sel* example" for an extended example which includes use of $Web_Selp.