Flex正则表达式判断中文或全角字符代码

for(var i:int=0;i<newStr.length;i++){
var char:String = newStr.substr(i,1);
if(/[^/x00-/xff]/g.test(char)){ //中文加10
screenLength = screenLength + 10;
}else{
screenLength = screenLength + 1;
}
}