JQUERY: Uncaught Error: Syntax error, unrecognized expression

The "double quote" + 'single quote' combo is not needed

console.log( $('#'+d) ); // single quotes only
console.log( $("#"+d) ); // double quotes only

Your selector results like this, which is overkill with the quotes:

$('"#abc"') // -> it'll try to find  <div id='"#abc"'>

// In css, this would be the equivalent:
"#abc"{ /* Wrong */ } // instead of:
#abc{ /* Right */ }

try

console.log($("#"+d));

your solution is passing the double quotes as part of the string.