load XML file, find() method

[Michel_Stucky]

Hello, I'm a new in Javascript and I don't understand why in de code snippet below

1) serial = $(this).find('SERIALNUMBER').text().toUpperCase(); 

retruns the actual serianumber from the loaded XML file and why

2) a = $(this).find(param5).text().toUpperCase();

doesn't, knowing that param5 is equal to 'SERIALNUMBER'

Thanks for clearing my mind

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code snippet

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   $.ajax({
        type: "GET",
        url: param3,
        dataType: "xml",
        success: function(xml) {
            $(xml).find(param4).each(function(){
                var searchString="";
                var a = [];
                for (i = 0; i < param6; i++) {
                    a = $(this).find(param5).text().toUpperCase();
                    serial = $(this).find('SERIALNUMBER').text().toUpperCase();
             
                }

[Michel_Stucky]

Sorry found it.

String(param5) solved my issue.

Thanks