function showHideCol(btnObj)
{
	var leftCol = document.getElementById('TD_LeftCol');
	var mainCol = document.getElementById('TD_MainCol');
	var toggDiv = document.getElementById('DIV_ToggleMenu');

	if (leftCol.getAttribute("is_visible") == "1" && dontCloseLeftPanel == false)
	{
		mainCol.colSpan = 2;
		leftCol.style.display = 'none';
		leftCol.setAttribute("is_visible", "0");
		btnObj.innerHTML = 'Paneli aç';
		setCookie("main_menu_visible", "0");
	}
	else
	{
		mainCol.colSpan = 1;
		if (navigator.appName.substring(0, "Microsoft".length) == "Microsoft")
			leftCol.style.display = 'block';
		else
			leftCol.style.display = 'table-cell';
		leftCol.setAttribute("is_visible", "1");

		btnObj.innerHTML = 'Paneli kapat';
		setCookie("main_menu_visible", "1");
	}
}