Package camelCasing transfer function

Its argument is xx-xxx-xx converted to xxXxxXxx

    // 1. camelCasing conversion and encapsulation 
  function changeString (A) {
     // var A = 'GET-Element-ID'; 
    var B = a.split ( '-');    // Split the specified string was cut into an array of characters 
    for ( var I = 0; I <to b.length; I ++) { // loop through the array b 
    // the charAt method to find the index 0 is the first character, the toUpperCase lowercase to uppercase, and then behind the splicing character 
        B [I] = B [I] .charAt (0) .toUpperCase () + B [I] .substr (. 1, B [I]-.length. 1 ) 
    } 
    return b.join ( '' );   // the Join function splicing (splicing default comma toString == ()) 
  } 
    the console.log (changeString ( 'GET-Element-ID'));