JQuery控制内容长度超出规定长度显示省略号

<scripttype="text/javascript">
$.fn.extend({
displayPart:function(){
vardisplayLength=100;
displayLength=this.attr("displayLength")||displayLength;
vartext=this.text();
if(!text)return"";

varresult="";
varcount=0;
for(vari=0;i<displayLength;i++){
var_char=text.charAt(i);
if(count>=displayLength)break;
if(/[^x00-xff]/.test(_char))count++;//双字节字符，//[u4e00-u9fa5]中文

result+=_char;
count++;
}
if(result.length<text.length){
result+="...";
}
this.text(result);
}
});

$(function(){
$(".displayPart").displayPart();
});

</script>