I have tried to make code for inbuild javascript function (touppercase).Does this helpfull or not? -

this code use inbuilt fuction of javascript touppercase shortformat benificial interview .sometimes need not use inbuilt functions ..so there code them.

    //change lower case upper case     function change_upper_case() {     var a1 = [], a6 = [], = 0; // define variables     a1 = document.getelementbyid('enterstring').value; //get value    enter     while(i < a1.length) { //check condition true or false         var a2 = a1[i];         var a3 = a2.charcodeat(0); //get ascii value of char in number format        var a5 = a2;    if(a3 >= 97 && a3 < 123) { // = 97 , z=122     var a4 = a3-32;     a5 = string.fromcharcode(a4); //change ascii value of a4 in char format     }     a6[i] = a5;     i++;     }     document.getelementbyid('showstring').innerhtml = a6.join(''); //print input string on browser   } 

        //change lower case upper case      function change_upper_case() {      	var a1 = [], a6 = [], = 0; // define variables      	a1 = document.getelementbyid('enterstring').value; //get value enter      while(i < a1.length) { //check condition true or false      	var a2 = a1[i];       	var a3 = a2.charcodeat(0); //get ascii value of char in number format      	var a5 = a2;      if(a3 >= 97 && a3 < 123) { // = 97 , z=122      	var a4 = a3-32;      	a5 = string.fromcharcode(a4); //change ascii value of a4 in char format      	}      	a6[i] = a5;      	i++;      	}      	document.getelementbyid('showstring').innerhtml = a6.join(''); //print input string on browser        }

        <input type="text" id="enterstring"/>      <input type="button" value="upper case" onclick="change_upper_case()"/>      <span id="showstring"></span><br/>

javascript has touppercase function string types, take http://www.w3schools.com/jsref/jsref_touppercase.asp