    this.disableChatSoundUser = function(inst)
    {
    	if (inst.find('> i').text() == 'volume_off') {
    		$.post(this.wwwDir+  'user/setsettingajax/chat_message/1');
    		confLH.new_message_sound_user_enabled = 1;
    		inst.find('> i').text('volume_up');
    	} else {
    		$.post(this.wwwDir+  'user/setsettingajax/chat_message/0');
    		confLH.new_message_sound_user_enabled = 0;
    		inst.find('> i').text('volume_off');
    	};

    	if (!!window.postMessage && parent) {
    		if (inst.find('> i').text() == 'volume_off') {
    			parent.postMessage("lhc_ch:s:0", '*');
    		} else {
    			parent.postMessage("lhc_ch:s:1", '*');
    		}
    	};

    	return false;
    };
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.