// es     onKeypress="return numeric(event, this)"
	
	function getElement(element){
		return document.getElementById(element);
	}
	
	function getElementByOwner(element,owner){
		return owner.getElementById(element);
	}
	
	function toggle_visibility(elementName){
		var element = "";
		
		try{element=getElement(elementName);}catch(e){}	
		
		if(element!=''){
			if(element.style.display=="none") 	element.style.display="block";
			else 								element.style.display="none";
		}	
	}
	
	function hide(elementName){
		var element = "";
		
		try{element=getElement(elementName);}catch(e){}	
		if(element!='') element.style.display="none";
		
	}
	
	function show(elementName){
		var element = "";
		
		try{element=getElement(elementName);}catch(e){}	
		if(element!='') element.style.display="block";
		
	}