regex for javascript to switch key:value => value:key for objects

key:value => value:key

search: ([ ]*)(.*?):\s?([^,\n\r]*)
repalce: $1$3:$2

example:
 var regionNames = {
        "australia":"Australia",
        "brazil":"Brazil",
        "canada":"Canada",
        "caribbean":"Caribbean",
        "centamer":"Central America",
        "centasia":"Central Asia",
        "chile":"Chile",
        "china":"China",
        "eastafr":"East Africa",
        "europe":"Europe",
        "greenland":"Greenland & Iceland",
        "korea":"Japan & Korea",
        "mexico":"Mexico",
        "mideast":"Middle East",
        "northafr":"North Africa",
        "northsamer":"N. South America",
        "peruecuador":"Peru & Ecuador",
        "russia":"Russia",
        "seasia":"SE Asia",
        "southafr":"S. South Africa",
        "southasia":"South Asia",
        "southsamer":"S. South America",
        "ukraine":"Ukraine",
        "usa":"United States",
        "westafr":"West Africa"
	};
	
	becomes
	
	 var regionNames = {
        "Australia":"australia",
        "Brazil":"brazil",
        "Canada":"canada",
        "Caribbean":"caribbean",
        "Central America":"centamer",
        "Central Asia":"centasia",
        "Chile":"chile",
        "China":"china",
        "East Africa":"eastafr",
        "Europe":"europe",
        "Greenland & Iceland":"greenland",
        "Japan & Korea":"korea",
        "Mexico":"mexico",
        "Middle East":"mideast",
        "North Africa":"northafr",
        "N. South America":"northsamer",
        "Peru & Ecuador":"peruecuador",
        "Russia":"russia",
        "SE Asia":"seasia",
        "S. South Africa":"southafr",
        "South Asia":"southasia",
        "S. South America":"southsamer",
        "Ukraine":"ukraine",
        "United States":"usa",
        "West Africa":"westafr"
	};