function PressEnterKey(btn) 
{
	/* Function to check the key pressed and click button if key was RETURN
	Allows for setting a default button 
	For this to work properly:
		all text boxes must start with 'txt'
		all drop down list must start with 'lst'
		all buttons must start with 'btn'
	*/
	
	if (event.keyCode == 13) 
	{
		//get the first 3 chars of the object name
		var intTxtFound = event.srcElement.name.indexOf('txt');
		var intLstFound = event.srcElement.name.indexOf('lst');
		
		//only issue button click if txt or ddl
		//ignore if cmd
		if (intTxtFound != 0 || intLstFound != 0)
		{
			event.cancelBubble = true;
			event.returnValue = false;
			document.all(btn).click();
		}
	}
}