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复制代码 代码如下:
<script>
function subString(str, len, hasDot)
{
var newLength = 0;
var newStr = "";
var chineseRegex = /[^\x00-\xff]/g;
var singleChar = "";
var strLength = str.replace(chineseRegex,"**").length;
for(var i = 0;i < strLength;i++){
singleChar = str.charAt(i).toString();
if(singleChar.match(chineseRegex) != null){
newLength += 2;
}else{
newLength++;
}
if(newLength > len){
break;
}
newStr += singleChar;
}

if(hasDot && strLength > len){
newStr += "...";
}
return newStr;
}
alert(subString("js截取中英文字符串无乱码",10,true));
</script>

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