Crm 2011- Update money field via soap endpoint javascript

How to update  money field  via soap end point javascript.

Facing problems in the below,

        request+= " </a:KeyValuePairOfstringanyType>";
        request+= " <a:KeyValuePairOfstringanyType>";
        request+= " <c:key>revenue</c:key>";
        request+= " <c:value i:type=\"d:decimal\" >50.00</c:value>";
        request+= " </a:KeyValuePairOfstringanyType>";