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POJavascript, yet another "too much recursion" issue: Revenge of evil eval()
 

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  1. POJavascript, yet another "too much recursion" issue: Revenge of evil eval()
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    <p>I'm working on a project (a very old one who was revived) for a client.</p> <p>When I browse one of the JSPs of the project in Firefox (4.0 in this case, but I suppose it happens with 3.x also), the following error appears on Firebug console:</p> <blockquote> <p>Error: too much recursion<br> Archivo fuente: <a href="https://localhost:9443/ClientProjectWeb/js/Object.js" rel="nofollow">https://localhost:9443/ClientProjectWeb/js/Object.js</a><br> Línea: 226</p> </blockquote> <p>Here is the code snippet of that line:</p> <pre><code>if(gControl){giveFocusToControl(gControl.name);} </code></pre> <p>This is the invoked function:</p> <pre><code>function giveFocusToControl(nombreControl){ var forma = document.forms[0]; var campo = null; if(forma){ var elemento = eval("forma."+nombreControl); if(eval(elemento.length)){ if(elemento.type == "select-one" || elemento.type == "select-multiple"){ campo = elemento; }else{ campo = elemento[0]; } }else{ campo = elemento; } if(campo.style &amp;&amp; campo.style.visibility){ if(campo.style.visibility != "hidden"){ campo.focus(); } }else{ campo.focus(); } } } </code></pre> <p>I suspect this has to do with <code>eval()</code> calls inside a function, but despite I have tried to replace those "evil" calls with [] alternative proposed in <a href="http://dev.opera.com/articles/view/efficient-javascript/?page=2" rel="nofollow">this document</a>, for example: <code>var elemento = forma[nombreControl];</code>, I haven't got the expected result, the error still is there: same line, same message.</p> <p>Please do you have any suggestion? Thanks in advance.</p>
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    1. USFrancisco Alvarado
    1. USFrancisco Alvarado
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    1. COWhat does the code around if(gControl) giveFocusToControl(gControl.name);} look like?
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    2. COIs `giveFocusToControl` invoked upon focus of a form or form element? If so it might be occurring because of this function being invoked repeatedly upon `campo.focus()`
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