javascript replace globally with array

var array = {"from1":"to1", "from2":"to2"}

for (var val in array)
    text = text.replace(new RegExp(val, "g"), array[val]);

Edit: As Andy said, you may have to escape the special characters using a script like this one.

Here is my solution, assuming the string keys in array need not to be escaped.

It is particularly efficient when the object array is large:

var re = new RegExp(Object.keys(array).join("|"), "g");
var replacer = function (val) { return array[val]; };
text = text.replace(re, replacer);

Note this requires the Object.keys method to be available, but you can easily shim it if it is not.

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