setting:{
startline:200,
scrollto:0,
scrollduration:400,
fadeduration:[500,100]
},
controlHTML:'<img src="images/back.png" style="width:58px; height:50px; border:0;" />',
controlattrs:{offsetx:30,offsety:80},
anchorkeyword:"#top",
state:{
isvisible:false,
shouldvisible:false