function onUpdatePreview(){
	var df = document.forms["MainForm"];
	df.submit();
}

function changeAction() {
    var df = document.forms["MainForm"];
    df.action = window.location.href;
    df.submit();
    return false;
}


function doResizePlank(){
    var df = document.forms["MainForm"];
    df.resizeplank.value = "1";
	df.submit();
}