var DataChanged = 0;


function IsChangedOK()
{

if (DataChanged == 1) 
	{
	var answer = confirm("You are about to navigate away with unsaved data. Press OK to continue and discard the data or Cancel to remain on this page.");

	if (answer==1) 
		{ 
			DataChanged = 0;
		}
	}

return !DataChanged;
}