js字符串截取函数(中文2个位置,英文1个位置)

function countCharacters(str,size){
     var totalCount = 0; 
     var newStr = "";
     for (var i=0; i<str.length; i++) { 
         var c = str.charCodeAt(i); 
         if ((c >= 0x0001 && c <= 0x007e) || (0xff60<=c && c<=0xff9f)) { 
             totalCount++; 
         }else {    
             totalCount+=2; 
         } 
         if(totalCount<size){
             newStr = str.substring(0,i+1);
         }else{
             return newStr+"...";
         }
     }
     return newStr;
}

评论

1 楼 cunsky 2010-09-25  

哎哟，不错哦