// JavaScript Document

function effect(id){
		
	if (!id)
		var x = true;
		
	for (var i=1; i<=5;i++){
		
		var curr_id = 'img_'+i;
		var text_id = 'txt_'+i;
		
		if (curr_id == id || x){
			setOpacity(curr_id,0);
			if (x)
				setSelected(text_id,1);
			else
				setSelected(text_id,0);
		} else {
			setOpacity(curr_id,1);
			setSelected(text_id,1);
		}
	}
}

function setOpacity(id,mode){
	
	var str_mode;

	if (mode == 0)
		str_mode = 'none';
	else
		str_mode = 'block';
		
	var element = document.getElementById(id);
		if (element){
			element.style.display=str_mode;	
		}
};

function setSelected(id,mode){
	
	
	var element = document.getElementById(id);
	
	if (element)
		return false;
	if (mode == 0){
		element.style.color='red';	
		}
	else {
		
		element.style.color='white';	
	}
	
		
};