rem: var frames = document.getElementsByTagName("IFRAME");  for (var i = 0, cnt = frames.length; i < cnt; i++) { frames.item(i).style.display = "block"; 
add:  var browsers = tw_WebBrowser.instances;  for (var id in browsers) { browsers[id].setDragLayerVisible(false); 
context:     _mouseUp: function(event) {        var newX = event.clientX;        var newY = event.clientY;        tw_removeEventListener(document, "mousemove", this._mouseMove);            tw_removeEventListener(document, "mouseup", this._mouseUp);        var frames = document.getElementsByTagName("IFRAME");        for (var i = 0, cnt = frames.length; i < cnt; i++) {            frames.item(i).style.display = "block";        }        var totalChangeInX = newX - this._startX;        var totalChangeInY = newY - this._startY;        this._callListener(2, totalChangeInX, totalChangeInY);        this._dragBox = null;    },
meta: 5515	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5515/5bba8babe4dfdeac0c204506b78f7acb17e18198/DragHandler.js/clean/src/thinwire/render/web/resources/DragHandler.js