var flag_state = '';
var dom			= document.getElementById ? 1 : 0;
var ie			= document.all ? 1 : 0;
var mac			= (navigator.userAgent.indexOf("Mac") > -1) ? 1 : 0;
var ieReal		= (ie && (!mac) && ( typeof(window.offscreenBuffering) != 'undefined') ) ? 1 : 0;
var isActiveX	= ieReal;
var isSp2		= ieReal && (window.navigator.userAgent.indexOf("SV1") != -1);

function changeOpacity(obj, opacity) {
	if(ieReal) {
		obj.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + (opacity * 100) + ')';
	}
	else if(dom) {
		obj.style.MozOpacity = opacity;
		//obj.style.opacity = opacity;
	}
}