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function loadscript(url) {
document.write('<scr' + 'ipt  type="text/javascript" src"' + url + '"><\/scr' + 'ipt>'>)
}
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function
matchDemo(){
   var s;
   var re = new RegExp("d(b+)(d)","ig");
 
 var str = "cdbBdbsbdbdz";
   var arr = re.exec(str);
   s = "$1
contains: " + RegExp.$1 + "\n";
   s += "$2 contains: " + RegExp.$2 +
"\n";
   s += "$3 contains: " + RegExp.$3;
   return(s);
}


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Fiddler
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