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    <p>It looks like you've mixed up server-side code with client-side code.</p> <p>The Grails code will be evaluated when the page is being "built" to be sent to the client browser.</p> <p>The Javascript code will be evaluated once the page has been delivered to the browser.</p> <p>With this in mind let's take a look at your onblur assignment:</p> <pre><code>onblur=${remoteFunction( action:'dave', update:'pack'+it.id, params: [denom: document.getElementById(denomValue+${it.id}).value, amount: this.value ])} </code></pre> <p>Given the ${remoteFunction...} call is a Grails tag, it will be evaluated on the server, generate a fixed string, then be sent to the client. Everything inside the call must be valid Groovy code.</p> <p>Look at the params map, you've added some Javascript in the denom value, <em>inside</em> the Groovy code:</p> <pre><code>document.getElementById(denomValue </code></pre> <p>then you try to add a value from Groovy</p> <pre><code>+${it.id} </code></pre> <p>then some Javascript again</p> <pre><code>).value </code></pre> <p>The Groovy compiler will try to evaluate the Javascript as Groovy code and fail.</p> <p>If you need to access client-side parameters in Javascript you'll need to handle the Javascript yourself (and not use the remoteFunction tag), for example to handle the remote call:</p> <pre><code>var path=${createLink(action:'dave', params: [amount:this.value])} + "&amp;denom=" + document.getElementById(denomValue+${it.id}).value </code></pre> <p>You'll also need to handle the remote response yourself using Javascript to update the 'pack' elements. You could always look at what the remoteFunction call generates, copy it into the page and edit it to do what you want.</p> <p>HTH</p>
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    1. CO+1 for the in depth technical explanation, which a lot of people get mixed up on. Mixing client side and server side understanding can be confusing, especially when server side languages try to generate Javascript for you. While the approach of handling everything in Javascript yourself is reasonable, the proper escaping of params answer can make more sense for one-offs.
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