Passing value to javascript function "onload" event from datagrid

Hi all, Very much confuse with this. I have a datagrid, and i am able to pass the value to javascript function through "onclick" event as below: e.item.attributes.add("onclick","javascript:myfunction('"+value1+"');"); but, when i am trying to pass the value of the first row on datagrid through "onload" event as below: dg.Items[0].Attributes.Add("onload","javascript:myfunction('"+value1+"');"); it's not passing the value. I have to use onload event, so i can display default value th' javascript function. Any help will be appreciated. Thanks, NIKI