Javascript String lpad( prependString , repeat)

/*//w w w. java2s .co  m
* @prependString - pattern which will be repeated and prepended to current String
* @times -  number of times the pattern will be repated
* 
This function will prepend the String with the specified  pattern repeated by the specified number of times
*/
String.prototype.lpad = function ( prependString , repeat) {
   
 if ( repeat == undefined || repeat <= 0 || prependString == undefined || prependString == "") {
  return this;
 }
 
 var padding = "";

 for (var index = 0; index < repeat ; index++ ) {
  padding = padding + prependString;
 }

 return padding + this;
};