js 正则表达式 ，除去字符串中 font-family:xxxx 这样的字符传

function removeFontFamily(contnet){
//remove repeat
var unique = function(arr) {
var result = [], hash = {};
for (var i = 0, elem; (elem = arr[i]) != null; i++) {
if (!hash[elem]) {
result.push(elem);
hash[elem] = true;
}
}
return result;
}
//
var arr = contnet.match(/(font-family:[^><;"]*(;)?)/ig);
arr = unique(arr);
for(var i=0;i<arr.length;i++){
console.log(arr[i]);
var reg = new RegExp(arr[i], "ig");
contnet = contnet.replace(reg,"");
}
return contnet;
}