static dialect requires

lib/sequelize.js

@@ -177,7 +177,26 @@ var Sequelize = function(database, username, password, options) {
   };
 
   try {
-    var Dialect = require('./dialects/' + this.getDialect());
+    var Dialect;
+    // Requiring the dialect in a switch-case to keep the
+    // require calls static. (Browserify fix)
+    switch (this.getDialect()){
+      case 'mariadb':
+        Dialect = require('./dialects/mariadb');
+        break;
+      case 'mssql':
+        Dialect = require('./dialects/mssql');
+        break;
+      case 'mysql':
+        Dialect = require('./dialects/mysql');
+        break;
+      case 'postgres':
+        Dialect = require('./dialects/postgres');
+        break;
+      case 'sqlite':
+        Dialect = require('./dialects/sqlite');
+        break;
+    }
     this.dialect = new Dialect(this);
   } catch (err) {
     throw new Error('The dialect ' + this.getDialect() + ' is not supported. ('+err+')');