function checkEnter(e)
{ //e is event object passed from function invocation
	var characterCode; 
	//literal character code will be stored in this variable
	
	if(e && e.which)
	{ //if which property of event object is supported (NN4)
		e = e;
		characterCode = e.which; //character code is contained in NN4's which property
	}
	else
	{
		e = event;
		characterCode = e.keyCode;//character code is contained in IE's keyCode property
	}
	
	if(characterCode == 13)
	{ //if generated character code is equal to ascii 13 (if enter key)
		window.open(this.href,'_blank');
		return false;
	}
	else
	{
		return true;
	}
}