added separate function for checksum

lib/utils/utils.js

@@ -405,6 +405,21 @@ var isAddress = function (address) {
         return true;
     } else {
         // Otherwise check each case
+        return isChecksumAddress(address);
+    }
+};
+
+
+
+/**
+ * Checks if the given string is a checksummed address
+ *
+ * @method isChecksumAddress
+ * @param {String} address the given HEX adress
+ * @return {Boolean}
+*/
+var isChecksumAddress = function (address) {    
+    // Check each case
     address = address.replace('0x','');
     var addressHash = web3.sha3(address.toLowerCase());
 
@@ -415,10 +430,10 @@ var isAddress = function (address) {
         }
     }
     return true;    
-    }
 };
 
 
+
 /**
  * Makes a checksum address
  *
@@ -565,6 +580,7 @@ module.exports = {
     isBigNumber: isBigNumber,
     isStrictAddress: isStrictAddress,
     isAddress: isAddress,
+    isChecksumAddress: isChecksumAddress,
     toChecksumAddress: toChecksumAddress,
     isFunction: isFunction,
     isString: isString,

lib/web3.js

@@ -91,6 +91,7 @@ Web3.prototype.toBigNumber = utils.toBigNumber;
 Web3.prototype.toWei = utils.toWei;
 Web3.prototype.fromWei = utils.fromWei;
 Web3.prototype.isAddress = utils.isAddress;
+Web3.prototype.isChecksumAddress = utils.isChecksumAddress;
 Web3.prototype.toChecksumAddress = utils.toChecksumAddress;
 Web3.prototype.isIBAN = utils.isIBAN;
 Web3.prototype.sha3 = sha3;