JS部分===========================
// 判断中英问混排时候的长度
function byteLength (sStr) {
aMatch = sStr.match(/[^/x00-/x80]/g);
return (sStr.length + (! aMatch ? 0 : aMatch.length));
}
function changeMaxLen(obj, len) {
var num = 0;
var strlen = 0;
var obj_value_arr = obj.value.split("");
for(var i = 0; i < obj_value_arr.length; i ++) {
if(i < len && num + byteLength(obj_value_arr[i]) <= len) {
num += byteLength(obj_value_arr[i]);
strlen = i + 1;
}
}
if(obj.value.length > strlen) {
obj.value = obj.value.substr(0, strlen);
}
}
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function byteLength (sStr) {
aMatch = sStr.match(/[^/x00-/x80]/g);
return (sStr.length + (! aMatch ? 0 : aMatch.length));
}
function changeMaxLen(obj, len) {
var num = 0;
var strlen = 0;
var obj_value_arr = obj.value.split("");
for(var i = 0; i < obj_value_arr.length; i ++) {
if(i < len && num + byteLength(obj_value_arr[i]) <= len) {
num += byteLength(obj_value_arr[i]);
strlen = i + 1;
}
}
if(obj.value.length > strlen) {
obj.value = obj.value.substr(0, strlen);
}
}
=================================
HTML部分==========================
<input type="text" name="blog_title" id="blog_title" class="input_text1" style="width:450px" maxlength="72" onblur="changeMaxLen(this, 72)" onKeyUp="changeMaxLen(this, 72)">
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