Update walletjs.html

1.Adjust the number of characters in each QR code from 400 to 250.
2.There is an error in the calculation of the miner fee per byte, which has been corrected.

walletjs.html

@@ -1605,7 +1605,7 @@
 
 	//生成二维码
 	function generateQrcode(content, parentElement){
-		var arr = mySplit(content, 400);
+		var arr = mySplit(content, 250);
 		for(var i = 0; i < arr.length; i++){
 			jQuery(function(){jQuery("#" + parentElement).qrcode(str2rstr_utf8(arr[i]));});
 			document.getElementById(parentElement).appendChild(document.createElement("br"));
@@ -1640,8 +1640,10 @@
 		}
 		txOutValue = txOutValue * 100000000;
 
-		var vBytes = Math.round((txInValue - txOutValue) / txSignedRawObj.txJSON.hex_raw_length * 100) / 100; //保留两位小数
-		return vBytes;
+		var txFee = txInValue - txOutValue;
+		var vBytes = txSignedRawObj.txJSON.hex_raw_length / 2;
+		var feepervB = Math.round(txFee / vBytes * 100) / 100; //保留两位小数
+		return feepervB;
 	}
 </script>
 </head>