下拉列表（Spinner）下拉列表（Spinner）
下拉列表(Spinner)
Method: first to get the default values in the hidden form field inside, write a JS method to remove hidden form fields in the value into a drop-down list box in the value method is called when a page loads the JS and OK method two: jud...
下拉列表（Spinner）
下拉列表(Spinner)
Method: first to get the default values in the hidden form field inside, write a JS method to remove hidden form fields in the value into a drop-down list box in the value method is called when a page loads the JS and OK method two: judge every option with JSTL in c:if tags the conditions set up by setting the selected property method in option three: struts tag binding
" feedback
"
agrees with the 1| review (1)
Select the check box to achieve over all, and then set the checked property to true multiple options. Reverse implementation: traverse all the check boxes, get the check box checked attribute value, is true, then set to false, otherwise set to true, that is, the current value of the opposite settings.
Concrete steps:
Code example:
Note: check in this case can be selected or select box must be set to name for iTo.
Tip: in this case, you don't actually need to iterate through
each element of the form, just go through the getElementsByName ("iTo") collection.
hot tip
After running the code, select the "select" check box, check box for all name iTo effect will be selected, as shown in figure 1.4.12.
Figure 1.4.12 select the check box
Special explanation
In this case, you need to master the traversal of the form item and the check box selection or uncheck the status settings or access.
Checked sets or gets the status of the check box or radio button, true is checked, false is not checked.
Elements gets a collection of all the controls in the specified order in the source (excluding the control objects of the image type).
The items in the check box are extracted from the database through a loop whose value value is the ID number of each record.
(1) I want to do a check box to select now, when you select "select all" checkbox, various projects have been selected automatically. Just like Sohu e-mail
The same as in. How do you write the procedure? Why can't I do it?
(2) how do I verify that the check box is selected? I mean, if the user does not select any check box, that is, the item is not selected, it is pressed
When you submit the button, the pop-up dialog box says, "sorry, you have to pick at least one item."!"
verification
Function SelectAll (V) {
Var f = document.thisform["C1"];
For (i=0; I
Function check (thisform) {
/ / the code here should be how to write?
{
Alert (sorry, you have to pick at least one item! ")
Return false;
}
Document.thisform.submit ();
}
I throw a brick of useful [0] [0] reference TOP reply report management number: 5
Meizz
(plum blossom snow)
Grade:
Three
Nine
More medals #1 floor score: replies: 2003-03-13, 12:04:34, , , , ,
, , , , ,
check the checkbox and anti
举报
