Using Javascript to update control values 1

[Casbah]

Hi, I have an asp.net 2.0 form.
It is made up as follows
It has a master page
It has 2 custom controls.
In one of the custom controls I have a read only text box
I have a button here too that opens a popup calendar
I want to populate the text box with the value from the calendar... My javascript is as follows
function OpenCalendar(idname)
{
var popUp;
var MyArgs = new Array('A');


for (var i = 0; i < 20; ++i)
{
// alert(document.forms[0].elements.name.substr(0, idname.length))
}
//var newUrl= 'Calendar.aspx?selected=' + document.forms[0].elements[idname].value;
var newUrl = 'Calendar.aspx'
popUp = window.showModalDialog(newUrl, MyArgs, WinSettings);
if (popUp != null)
{if (popUp[0] !== 'CANCEL')
{
document.forms[0].elements[idname].value = popUp[0].toString();
}
}


However it never finds my textbox control to update.
the call to the javascript is
javascript:OpenCalendar('txtDateStart') for the textbox...
If i do a loop through all the document.forms[0].elements and print their name the name i get for this txtDateStart is: ctl00$ContentPlaceHolder1$EntertainmentAdminPanel1$txtDateStart

Am I doing sometihng wrong?
Do I have to pass this full name for it to work?
Thanks

 

[ca8msm]

Yes, you have to pass the full name through otherwise the javascript can't find the element. You can find the id that is rendered by using the ClientID property of the relevant control.


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