function loadIfNotYetLoaded(cssFilePathName){
	cssLoaded = false;
	var ss = document.styleSheets;
	for (var i = 0, max = ss.length; i < max; i++) {
		var sheet = ss[i];
		if(sheet.href.indexOf(cssFilePathName) != -1){
			cssLoaded = true;
			break;
		}
	}

	if(!cssLoaded){		
		var link = document.createElement("link");
		link.rel = "stylesheet";      
		link.href = cssFilePathName;
		document.getElementsByTagName("head")[0].appendChild(link);		
	}
}