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Extend the String Method Example

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Simple extension of the string method using string.prototype.

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  1. function fmtHeading(level) {
  2. 	stringtext = this.toString();
  3. 	starttag = "<h" + level + ">";
  4. 	endtag = "</h" + level + ">";	
  5. 	return starttag + stringtext + endtag;
  6. }
  7.  
  8. String.prototype.heading = fmtHeading;
  9. document.write("This is a heading!".heading(2));

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