JS递归将字符串中的字符替换为目标字符

//repStr:原字符串--rgExp:被替换的字符--replaceText：去替换的字符
function replaceString(repStr, rgExp, replaceText){
	var str = repStr.replace(rgExp, replaceText)
	if ( str.indexOf(rgExp) != -1 ){
		str = replaceString(str, rgExp, replaceText);
	}　
	return str;
}