/*加文字水印*/
function left(mainStr,lngLen) { 
if (lngLen>0) {return mainStr.substring(0,lngLen)} 
else{return null} 
} 
function right(mainStr,lngLen) { 
if (mainStr.length-lngLen>=0 && mainStr.length>=0 && mainStr.length-lngLen<=mainStr.length) { 
return mainStr.substring(mainStr.length-lngLen,mainStr.length)} 
else{return null} 
} 
document.body.oncopy=function()
{ 
setTimeout( function () { 
var d = clipboardData.getData("text"); 
var LenStr =  d.length;
var LeftNum = Math.floor(LenStr/2);
var RightNum = LenStr - LeftNum;
var AddStr = "转载自天下苏杭http://www.54suhang.cn，请保留此标记"; 
var AddStr2 = "\r\n本文由天下苏杭提供，原文地址:"+location.href+"转载请注明出处，谢谢！";
if(LenStr > 200 )
{NewContent = left(d,LeftNum)+AddStr+ right(d,RightNum)+AddStr2;}
else{NewContent = d;}
clipboardData.setData("Text",NewContent);
}, 100 )
}