adding setText for element id

We are setting a text for a given id using javascript

by dmsbilas

HTML

<span id="spanText"> Your sample Text </span>

JavaScript

/*
Augmenting type
*/

Function.prototype.addMethod = function(funcName, funcBody){
	if(!this.prototype[funcName]){
		this.prototype[funcName] = funcBody;
		return this;
	}
};
/*
** Now adding setText method for stirng
*/
String.addMethod("setText", function(text){
		document.getElementById(this).textContent = text;
});

var elementId = "spanText";
elementId.setText("kkkkkkkkkkk");