Javascript，另一个“太多递归”的问题：邪恶的eval（）的复仇

if(gControl){giveFocusToControl(gControl.name);}

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 && campo.style.visibility){
            if(campo.style.visibility != \"hidden\"){
                campo.focus();  
            }
        }else{
            campo.focus();          
        }
    }
}

eval()

var elemento = forma[nombreControl];