Insert dynamic parameters to sqlite database statements
I would create an object to model my dynamic parameters using the following interfaces:

{ //reduced format
    clause: string,
    params: an array of parameters if more than one is used
}
{ //simple entry format
    clause: string
    param: the parameter if only one is used
}
{ //or format
    or: an array of dynamic parameter interfaces to be joined as part of an or clause
}
{ //and format
    and: an array of dynamic parameter interfaces to be joined as part of an and clause
}


From here I could use the following functions:

function reduce(param) {
    var clause = [], params = [], nest, nestType;
    if (param.clause !== undefined &amp;&amp; param.params) {
        //already in reduced format 
        return param;
    }
    if (param.clause !== undefined &amp;&amp; param.param !== undefined) {
        //convert simple format to reduced
        return { clause: param.clause, params: [param.param] };
    }
    if (param.clause) {
        //special case (clause without additional parameter)
        //parameters without clause would be done by using empty string
        return { clause: param.clause, params: [] };
    }
    //convert nested forms (and and or)
    if (param.and) {
        nest = param.and;
        nestType = ' AND ';
    } else if (param.or) {
        nest = param.or;
        nestType = ' OR ';
    } else {
        throw new Error('Invalid dynamic parameter found');
    }
    nest.forEach(function (p) {
        p = reduce(p);
        clause.push(p.clause);
        params.push.apply(params, p.params);
    });
    return {
        clause: '(' + clause.join(nestType) + ')',
        params: params
    };
}

function executeDynamicSql(tx, base, dynamicparameter, onSuccess, onError) {
    var reduction = reduce(dynamicparameter);
    tx.executeSql(base + reduction.clause, reduction.params, onSuccess, onError);
}


And call it (in your test case) like so:

executeDynamicSql(tx, 'SELECT Data from Table Where ', {
    clause: 'something = ?',
    param: anyvariable
}, successFn, errorCB);


What is nice about this function is that it can handle a far more complex where clause such as:

var dynamicwhere = {
        or: [
            {clause: 'something = ?', param: somethingid},
            {clause: 'somethingelse = ?', param: somethingelse},
            {clause: 'somedate between ? and ?', params: [d1, d2]},
            {
                and: [
                    {clause: 'amt &gt; ?', param: min},
                    {clause: 'amt &lt; ?', param: max},
                ]
            }
        ]
    };

executeDynamicSql(tx, 'SELECT Data from Table Where ', dynamicwhere, successFn, errorCB);


Ultimately executing:

SELECT Data from Table Where (something = ?
                           or somethingelse = ?
                           or somedate between ? and ?
                           or (amt &gt; ? and amt &lt; ?))


With the in order parameter list:

[somethingid, somethingelse, d1, d2, min, max]


You could do something more fancy using a regex replace or whatever, but I don't think it should be necessary.