How to apply DRY principle in javascript code snippet -

i have code snippet , avoided repeating of 2 regular expression in if condition because can see differs in 1 digit.

'phonenumberregexp': function (phonecode, homenumber) {     if (phonecode === 372) {         return /[\s]*^\s*(\d[\s\-\u00b7]*){6,13}$/.test(homenumber);     } else {         return /[\s]*^\s*(\d[\s\-\u00b7]*){8,13}$/.test(homenumber);     } } 

any idea how done?

thank in advance

if want can create dynamic regex , use it

'phonenumberregexp': function (phonecode, homenumber) {     return new regexp('[\\s]*^\\s*(\\d[\\s\\-\\u00b7]*){' + (phonecode === 372 ? 6 : 8) + ',13}$').test(homenumber); }