function extInclude(filename){
	var head = document.getElementsByTagName('head')[0];
	
	script = document.createElement('script');
	script.src = filename;
	script.type = 'text/javascript';
	
	$(script).insertBefore($('head script:last'));
}

function extGetParam(value,def){
    if(value == '' || value == null){
        return def;
    }else{
        return value;
    }
}




$.extInit = function(json_options){
    var str_extensions = json_options.extensions;
    var arr_extensions = str_extensions.split(',');
    extInclude(json_options.path + 'core/js/jquery.contextMenu.js');
    
    for(var i = 0;i < arr_extensions.length;i++){
        extInclude(json_options.path + arr_extensions[i] + '/js/jquery-ui.' + arr_extensions[i] + '.js');
    }
    
    
}