jQuery.fn.extend({
	getStyleSheet: function(name) {
		if(!name || !document.styleSheets) 
			return null;
		var i = document.styleSheets.length;
		while(i--) {
			var rules = document.styleSheets[i].rules ? document.styleSheets[i].rules : document.styleSheets[i].cssRules;
			var j = rules.length;
			while(j--) { 
				if(rules[j].selectorText == name) 
					return rules[j].style.cssText; 
			}
	   	}
		return null;
	},
	emptyInput: function(obj){
		switch(obj.tagName){
			case 'INPUT':
				obj.value = "";
				break;
			case 'TEXTAREA':
				obj.innerHTML = "";
				break;
		}
	},
	getAjax: function(file,id,data) {
		url = _URL+"ajax/getContent.php?file="+file;
		jQuery.ajax({
			type: "POST",
			url: url,
			data: data,
			success: function(r){
				jQuery('#'+id).html(r);
			}
		});
		return false;
	}
});