function changecss(myclass,element,value) {
	var CSSRules
	if (document.all) {
		CSSRules = 'rules'
	}
	else if (document.getElementById) {
		CSSRules = 'cssRules'
	}
	for (var i = 0; i < document.styleSheets[0][CSSRules].length; i++) {
		if (document.styleSheets[0][CSSRules][i].selectorText == myclass) {
			document.styleSheets[0][CSSRules][i].style[element] = value
		}
	}	
}