//Font size control
function _doZoom(size) {
	document.getElementById('zoomtext').style.fontSize=size+'px';
}

//Import view or hidden control
function _TrackBack(sid) {
    if(document.getElementById(sid).style.display == "none") {
        document.getElementById(sid).style.display = "";
    } else {
        document.getElementById(sid).style.display = "none";
    }
}