function blackOrWhite(color){
	var avg = parseInt(color.substring(1,3),16)*0.3 + parseInt(color.substring(3,5),16)*0.59 + parseInt(color.substring(5,7),16)*0.11 ;
	if(avg<128){
		return '#FFFFFF';
	}else{
		return '#000000';
	}
}

function initializeCloudStyle(){
	cloud = document.getElementById('tag_cloud');
	cloud_style = cloud.style;
	credit = document.getElementById('tag_credit');
	credit_style = credit.style;
	credit_text_style = credit.childNodes[0].style;

	cloud_style.width = tag_cloud_width;
	credit_style.width = tag_cloud_width;

	cloud_style.fontSize = tag_cloud_font_size;

	cloud_style.borderColor = tag_cloud_border;
	credit_style.borderColor = tag_cloud_border;
	credit_style.background = tag_cloud_border;
	credit_text_style.color = blackOrWhite(tag_cloud_border);

	cloud_style.background = tag_cloud_background;
	
	cloudLink = cloud.getElementsByTagName('a');
	var l = cloudLink.length;
	for(var i=0;i<l;i++){
		cloudLink[i].style.color = tag_cloud_link;
	}
}
initializeCloudStyle();