--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/inkscape/firefox/content/css.js	Mon Mar 09 01:27:33 2009 +0800
@@ -0,0 +1,50 @@
+function get_css(rule_name, stylesheet, delete_flag) {
+	if (!document.styleSheets) return false;
+	rule_name = rule_name.toLowerCase(); stylesheet = stylesheet || 0;
+	for (var i = stylesheet; i < document.styleSheets.length; i++) { 
+		var styleSheet = document.styleSheets[i]; css_rules = document.styleSheets[i].cssRules || document.styleSheets[i].rules;
+		if(!css_rules) continue;
+		var j = 0;
+		do {
+			if(css_rules[j].selectorText.toLowerCase() == rule_name) {
+				if(delete_flag == true) {
+					if(document.styleSheets[i].removeRule) document.styleSheets[i].removeRule(j);
+					if(document.styleSheets[i].deleteRule) document.styleSheets[i].deleteRule(j);
+					return true;
+				}
+				else return css_rules[j];
+			}
+		}
+		while (css_rules[++j]);
+	}
+	return false;
+}
+function add_css(rule_name, stylesheet) {
+	rule_name = rule_name.toLowerCase(); stylesheet = stylesheet || 0;
+	if (!document.styleSheets || get_css(rule_name, stylesheet)) return false;
+	(document.styleSheets[stylesheet].addRule) ? document.styleSheets[stylesheet].addRule(rule_name, null, 0) : document.styleSheets[stylesheet].insertRule(rule_name+' { }', 0);
+	return get_css(rule_name);
+}
+function get_sheet_num (href_name) {
+	if (!document.styleSheets) return false;
+	for (var i = 0; i < document.styleSheets.length; i++) { if(document.styleSheets[i].href && document.styleSheets[i].href.toString().match(href_name)) return i; } 
+	return false;
+}
+function remove_css(rule_name, stylesheet) { return get_css(rule_name, stylesheet, true); }
+
+function add_sheet(url, media) {
+	if(document.createStyleSheet) {
+		document.createStyleSheet(url);
+	}
+	else {
+		var newSS	= document.createElement('link');
+		newSS.rel	= 'stylesheet';
+		newSS.type	= 'text/css';
+		newSS.media	= media || "all";
+
+		newSS.href	= url;
+		// var styles	= "@import url(' " + url + " ');";
+		// newSS.href	='data:text/css,'+escape(styles);
+		document.getElementsByTagName("head")[0].appendChild(newSS);
+	}
+}
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