Difference between revisions of "Add Options to a Combo Box Using JavaScript"
From SmartWiki
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You can use a JavaScript function to modify the options available in a pull-down box on the page. | You can use a JavaScript function to modify the options available in a pull-down box on the page. | ||
− | The following example adds a new blank selection at the top of the ''starthour'' field at '''Level 2''': | + | The following example adds a new blank selection at the top of the ''starthour'' field at '''Level 2''' for new records: |
<pre> | <pre> | ||
function changeStartHour() | function changeStartHour() | ||
{ | { | ||
+ | if (document.forms[0].eventid.value==0) | ||
try | try | ||
{ | { | ||
Line 14: | Line 15: | ||
document.forms[0].starthour.add(new Option("", "", true, true), 0) | document.forms[0].starthour.add(new Option("", "", true, true), 0) | ||
} | } | ||
+ | } | ||
} | } | ||
changeStartHour(); | changeStartHour(); |
Revision as of 14:51, 31 July 2009
You can use a JavaScript function to modify the options available in a pull-down box on the page.
The following example adds a new blank selection at the top of the starthour field at Level 2 for new records:
function changeStartHour() { if (document.forms[0].eventid.value==0) try { document.forms[0].starthour.add(new Option("", "", true, true), document.forms[0].starthour.options[0]) } catch(e) { //in IE, try the below version instead of add() document.forms[0].starthour.add(new Option("", "", true, true), 0) } } } changeStartHour();
The options available are:
- document.forms[0].starthour.add(new Option(Display text, Store value, defaultSelected, selected), document.forms[0].starthour.options[0])