javascript - Concatenating a variable as the jQuery val() argument? -

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i'm trying set value attribute of input (a hidden input in form) using jquery val() function. idea concatenate name of variable , pass argument function, doesn't work expected. code in question in last line:

$(document).ready(function(){      var hash =  document.location.hash;     var turismossid = "1c0f8e3ec28b09f9487140930a0c0b73";     var comercialessid = "b31150acd348f775785b7c4a7398a3c6";      if (hash === "#turismos") {       activatab("turismos");       $('#js-sid').val(turismossid);     } else {         activatab("comerciales");         $('#js-sid').val(comercialessid);     }      $('#js-turismos-btn').on('click', function(){         activatab("turismos");         document.location.hash = "turismos";     });      $('#js-comerciales-btn').on('click', function(){         activatab("comerciales");         document.location.hash = "comerciales";     });       function activatab(cual){         $('#js-turismos-btn').addclass('bg-faded');         $('#js-turismos').hide();         $('#js-comerciales-btn').addclass('bg-faded');         $('#js-comerciales').hide();          $('#js-'+ cual + '-btn').removeclass('bg-faded');                $('#js-'+ cual).fadein(300);          $('#js-sid').val(cual + "sid");     }  });

rather set input's value either of variables turismossid or comercialessid, function sets value string turismossid or comercialessid. doing wrong?

unfortunately can't reference variables through string concatenation*.

to require put turismossid , comercialessid values in object, can reference keys of object using string concatenate together. try this:

var sids = {     turismossid: "1c0f8e3ec28b09f9487140930a0c0b73",     comercialessid: "b31150acd348f775785b7c4a7398a3c6" }  if (hash === "#turismos") {     activatab("turismos");     $('#js-sid').val(sids.turismossid); } else {     activatab("comerciales");     $('#js-sid').val(sids.comercialessid); }  // in activatab() $('#js-sid').val(sids[cual + "sid"]);

*you use eval() it's considered worst thing can possibly use in js code, i'm including in note sake of completeness.


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