Difference between revisions of "Add Options to a Combo Box Using JavaScript"
From SmartWiki
| Line 1: | Line 1: | ||
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 13:51, 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])
