function disableoption(control)
		{
		var formObj = document.forms[0];
		for (i=0;i<formObj.length;i++)
		{
		fldObj = formObj.elements[i];
		if (fldObj.type == 'text')
		{
		var name = control;
		if (fldObj.id == name && fldObj.disabled == true)
			fldObj.disabled = false;
		else if(fldObj.id == name && fldObj.disabled == false)
			fldObj.disabled = true;
		}}}