At least I can answer my own question #1 now: disabled-attribute needs
to be removed if it shouldn't be applied, setting it to blank does not
help. So my code was changed to:
function SetDeleteStatus()
{
var foo="disabled";
$("#gvFolderItems input:checkbox").attr("checked",function()
{if (this.checked) {foo="";}
}
)
if (foo=="") {
// $("#DeleteButton").removeAttribute("disabled");
// ^^^^ error: object does not support selected property or
method!
document.getElementById("DeleteButton").removeAttribute("disabled");
} else {
document.getElementById("DeleteButton").setAttribute("disabled","disabled");
}
alert("deletebutton=" + foo);
}
There was a surprise along the way, as $("#DeleteButton") led to an
error "Object does not supported property or method" whereas it works
fine with document.getElementById - I thought the two were
interchangeable...?
