输入框的文字限制字数,用微软拼音输入内容会被清空或者部分清空
对输入框的文字限制字数,用微软拼音输入输入的时候,只要一达到输入限制,就跳出"字数不能超过57" ,这时,问题出现了,前面输入的内容会被清空或者部分清空
<script language="javascript">
function gbcount(message,total,used,remain)
{
? var max;
? max = total.value;
? if(message.value.length > max){
??? message.value = message.value.substring(0,max);
??? used.value = max;
??? remain.value = 0;
??? alert('字数不能超过57!');
? }
? else{
??? used.value = message.value.length;
??? remain.value = max - used.value;
? }
}
</script>
<form name="form1" method="post"?? action="do.asp">
<textarea name="sms_content" cols="48" rows="8"?? id="sms_content" onkeydown=gbcount(this.form.sms_content,this.form.total,this.form.used,this.form.remain); onkeyup=gbcount(this.form.sms_content,this.form.total,this.form.used,this.form.remain); ></textarea>
最多字数：<input name=total disabled value=57 size=3 maxlength=4>
????????????????????? 已用字数：
????????????????????? <input name=used disabled value=0 size=3 maxlength=4>
????????????????????? 剩余字数：
????????????????????? <input name=remain disabled size=3 maxlength=4>
</form>
?
解决方法
<script language="javascript">
function gbcount(message,total,used,remain)
{
? var max;
? max = total.value;
? if(message.value.length > max){
??? used.value = max;
??? remain.value = 0;
??? alert('字数不能超过57!');
?message.value = message.value.substring(0,max);
? }
? else{
??? used.value = message.value.length;
??? remain.value = max - used.value;
? }
}
</script>
<form name="form1" method="post"?? action="do.asp">
<textarea name="sms_content" cols="48" rows="8"?? id="sms_content" onkeydown=gbcount(this.form.sms_content,this.form.total,this.form.used,this.form.remain); onkeyup=gbcount(this.form.sms_content,this.form.total,this.form.used,this.form.remain); ></textarea>
最多字数：<input name=total disabled value=57 size=3 maxlength=4>
????????????????????? 已用字数：
????????????????????? <input name=used disabled value=0 size=3 maxlength=4>
????????????????????? 剩余字数：
????????????????????? <input name=remain disabled size=3 maxlength=4>
</form>
?
?
不需要alert的话可以采用这样的方法
?? document.getElementById("sms_content").blur();
?message.value = message.value.substring(0,max);
?? document.getElementById("sms_content").focus();
?
?
?
