js判斷字符長度及中英文數字等

複製代碼代碼如下:

<script type="text/javascript">

var zfl={};

zfl.GetLength = function(str){

var realLength = 0,len = str.length,charCode = -1;

for(var i=0;i<len;i++){

charCode = str.charCodeAt(i);

if(charCode>0 && charCode<=128) realLength +=1;

else realLength += 2;

else realLength += 2;

else realLength += 2;

<script type="text/javascript">

alert(zfl.GetLength("中國123zkrljl"));

</script>

效果如圖：