function changecss(theclass,element,value) 
{
//documentation for this script at http://www.shawnolson.net/a/503/
	var cssRules;
	if (document.all) 
	{
		cssRules = 'rules';
	}else if (document.getElementById) 
	{
		cssRules = 'cssRules';
	}
	for (var S = 0; S < document.styleSheets.length; S++){
		for (var R = 0; R < document.styleSheets[S][cssRules].length; R++) 
		{
			if (document.styleSheets[S][cssRules][R].selectorText == theclass) 
			{
				document.styleSheets[S][cssRules][R].style[element] = value;
			}
		}
	}
}