javascript - Set default url parameter value when none is specified -

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i found answer getting url arguments javascript on internet:

function geturlparameter(name) {     return decodeuricomponent((new regexp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search)||[,""])[1].replace(/\+/g, '%20'))||null }

i wondering if there way modify this, when no url arguments specified, preset value become argument value.

eg. index.html?value=1 return 1,

if set default value 2, , types index.html variable value 2.

add argument specify default value if key missing:

function geturlparameter(name, _default) {     var value = decodeuricomponent((new regexp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search)||[,""])[1].replace(/\+/g, '%20')) || null     return value !=null ? value : _default; }

(fyi implementation treats ; delimiter: k=a;b return a, bit odd.)


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