function disable_industry_others() {
	
		//--- initialize variables
		var industry;
		var industry_others;
		
		if (document.getElementById('industry').value == "Others")
		{
				document.getElementById('industry_others').disabled = false;
		}
		else if (document.getElementById('industry').value == "")
		{
				document.getElementById('industry_others').disabled = true;
				document.getElementById('industry_others').value = "";
		}
		else
		{
				document.getElementById('industry_others').disabled = true;
				document.getElementById('industry_others').value = "";
		}
				
}