function button_opacity(m_id,on_off){
	if (on_off == "on"){
		document.getElementById(m_id+"_button").style = "filter: alpha(opacity=100, finishopacity=100, style=2)";
	}else{
		document.getElementById(m_id+"_button").style = "filter: alpha(opacity=65, finishopacity=65, style=2)";
	}

}