function SelectDeselectExternalChkB(sender, externalSubjectTable) {
	if (sender.innerHTML == "Select All") {
		sender.innerHTML = "Deselect All";
		checked = true;
	}
	else {
		sender.innerHTML = "Select All";
		checked = false;
	}
	var tableObj = this.document.getElementById(externalSubjectTable);
	for (i = 0; i < tableObj.rows.length; i++) {
		var row = tableObj.rows[i];
		for (j = 0; j < row.cells.length; j++) {
			var checkBox1 = tableObj.rows[i].cells[j].getElementsByTagName("input");
			if (checkBox1[0] != undefined)
				checkBox1[0].checked = checked;
		}
	}
	return false;
}