function refreshCaptcha()
{
	var css = new Array('blue','red','green','black','purple');
	var d, currentMinute;
	d = new Date();
	currentMinute = d.getMinutes();

	if(d.getMinutes()>=30)
		currentMinute = Math.floor((d.getMinutes()-30)/5);
	else
		currentMinute = Math.floor(d.getMinutes()/5);
	
	var image = new Image();
	
	image.src = "captcha/captcha_code_file.php?style="+css[currentMinute%5]+"&ts="+d.getTime();
	
	
	document.getElementById('captcha').src = image.src;
	/*
	new Ajax.Request('',{
		onSuccess: function(){
		
		}
	});
	*/
}


document.observe('dom:loaded',function(){
	refreshCaptcha();
})