document.getElementById("ctrl").disabled = true;
this works in IE but does not works in mozila. What shoul I do?
Did you try:
document.getElementById("ctrl").setAttribute('disabled', true);
<body>
<input id="btnSubmit" type="button" value="submit" onclick="disabled(this);"/>
<script>
function disabled(ctrl) {
ctrl.disabled = true;
}
</script>
</body>
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