Convert minutes to hours in JavaScript

Convert minutes to hours in JavaScript . Eg: 400 minutes -> 06hrs 40min

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1. <script type="text/javascript">  
2.   
3. function minutesToStr(minutes) {  
4.  var sign ='';  
5.  if(minutes < 0){  
6.   sign = '-';  
7.  }  
8.   
9.  var hours = leftPad(Math.floor(Math.abs(minutes) / 60));  
10.  var minutes = leftPad(Math.abs(minutes) % 60);  
11.   
12.  return sign + hours +'hrs '+minutes + 'min';  
13.   
14. }  
15.   
16. var hrs = minutesToStr(400);  
17.   
18. alert(hrs);              
19.   
20. /* 
21.  * add zero to numbers less than 10,Eg: 2 -> 02 
22.  */  
23. function leftPad(number) {    
24.     return ((number < 10 && number >= 0) ? '0' : '') + number;  
25. }  
26.   
27. </script>  

<script type="text/javascript">

function minutesToStr(minutes) {
 var sign ='';
 if(minutes < 0){
  sign = '-';
 }

 var hours = leftPad(Math.floor(Math.abs(minutes) / 60));
 var minutes = leftPad(Math.abs(minutes) % 60);

 return sign + hours +'hrs '+minutes + 'min';

}

var hrs = minutesToStr(400);

alert(hrs);            

/*
 * add zero to numbers less than 10,Eg: 2 -> 02
 */
function leftPad(number) {  
    return ((number < 10 && number >= 0) ? '0' : '') + number;
}

</script>