// JavaScript Document
function tabs(tab){
	var tabPath 				= '/assets/images/';
	
	var tab_summary_up			= new Image();
	var tab_biography_up		= new Image();
	var tab_questions_up		= new Image();
	var tab_submitquestion_up	= new Image();
	
	var tab_summary_down		= new Image();
	var tab_biography_down		= new Image();
	var tab_questions_down		= new Image();
	var tab_submitquestion_down	= new Image();
	
	tab_summary_up.src			= tabPath + 'summary_up.gif';
	tab_biography_up.src		= tabPath + 'biography_up.gif';
	tab_questions_up.src		= tabPath + 'questions_up.gif';
	tab_submitquestion_up.src	= tabPath + 'submitquestion_up.gif';
	
	tab_summary_down.src		= tabPath + 'summary_over.gif';
	tab_biography_down.src		= tabPath + 'biography_over.gif';
	tab_questions_down.src		= tabPath + 'questions_over.gif';
	tab_submitquestion_down.src	= tabPath + 'submitquestion_over.gif';
	
	if(document.images.tab_summary != undefined){
		document.images.tab_summary.src 	= tab_summary_up.src;
	}
	
	if(document.images.tab_biography != undefined){
		document.images.tab_biography.src 	= tab_biography_up.src;
	}
	
	if(document.images.tab_questions != undefined){
		document.images.tab_questions.src 	= tab_questions_up.src;
	}
	
	if(document.images.tab_submitquestion != undefined){
		document.images.tab_submitquestion.src 	= tab_submitquestion_up.src;
	}
	
	if(document.getElementById('summary') != undefined){
		document.getElementById('summary').className = 'hide';
	}
	
	if(document.getElementById('biography') != undefined){
		document.getElementById('biography').className = 'hide';
	}
	
	if(document.getElementById('questions') != undefined){
		document.getElementById('questions').className = 'hide';
	}
	
	if(document.getElementById('submitquestion') != undefined){
		document.getElementById('submitquestion').className = 'hide';
	}
	
	switch(tab){
		case 'biography':
			document.images.tab_biography.src = tab_biography_down.src;
			
			if(document.getElementById('biography') != undefined){
				document.getElementById('biography').className = 'show';
			}
		break;
		case 'questions':
			document.images.tab_questions.src = tab_questions_down.src;
			
			if(document.getElementById('questions') != undefined){
				document.getElementById('questions').className = 'show';
			}
		break;
		case 'submitquestion':
			document.images.tab_submitquestion.src = tab_submitquestion_down.src;
			
			if(document.getElementById('submitquestion') != undefined){
				document.getElementById('submitquestion').className = 'show';
			}
		break;
		default:
			document.images.tab_summary.src = tab_summary_down.src;
			
			if(document.getElementById('summary') != undefined){
				document.getElementById('summary').className = 'show';
			}
			if(document.getElementById('submitquestion') != undefined){
				document.getElementById('submitquestion').className = 'show';
			}
		break;
	}
}