Thanks for your answer Dinesh.

I created a selection list from a "EntryGroup".

I have a company grid below with a checkbox column.

I would like to change the checked status following my selection list. How to do this?

Here my code :

public override void BuildContents()

{

if (this.Mode.Equals(Sage.Mode.View))

{

this.Mode = Sage.Mode.Edit;

}

GetTabs();

AddContent("My Custom Page");

AddContent("
");

List ResultsGrid = new List("CompanyGrid");

EntryGroup group = new EntryGroup("CompanyStatusCustom");

vpMainPanel.AddAttribute("width", "100%");

group.GetHtmlInEditMode();

vpMainPanel.Add(group);

AddContent(vpMainPanel);

ResultsGrid[9].IsVisible = false;

GridColCheckBox myCheckBox = new GridColCheckBox("comp_check");

myCheckBox.ReadOnly = false;

ResultsGrid.Add(myCheckBox);

AddContent(HTML.Form(432, 2));

ResultsGrid.Title = "MENGOOOO";

AddContent(ResultsGrid);

AddUrlButton("Test", "Save.gif", JsCheckBox());

}

Here is javascript code :

private string JsCheckBox()
{
return
"javascript:" +
"var schecked='';" +
"for(i=0;i" +
"if (document.EntryForm.elements[i].name=='_CKBXcomp_check') {" +
"if (document.EntryForm.elements[i].checked==true) {" +
...?
"}" +
"}" +
"}" +
"if (schecked == '')" +
"alert('No Check Box Selected');" ;
}

Am I on the right track?

Thanks.

Porque me sale este error? 

VM18410:1 Uncaught TypeError: Cannot read property 'elements' of undefined

Porque me sale este error? 

VM18410:1 Uncaught TypeError: Cannot read property 'elements' of undefined