var extNum=0;
var extName=new Array(extNum);
var extHtml=new Array(extNum);
var extX=new Array(extNum);
var extY=new Array(extNum);
var extWidth=new Array(extNum);
var extHeight=new Array(extNum);
var extPage=new Array(extNum);
var extZoomLevel = new Array(extNum);
var extType = new Array(extNum);