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複製代碼 代碼如下:
<html>
<body>
<textarea id="t"></textarea>
<input type="text" id="b2" />
<script type="text/javascript">
textAreaLimit("t",{lastMsgLabel:"b2"})
function textAreaLimit(area,op){
var defaultOp = {
maxLength:10 //最大長度
, IsNumber:false //只能是數字
, lastMsgLabel:null //即時顯示可輸入個數的Input
, msg:"還可以輸入{0}個文字"
, errorMsg:"文字個數超出最大限制"
};
var label;
if(typeof area == "string"){
area = document.getElementById(area);
}
if(!area){
return;
}
for(var i in op){
defaultOp[i] = op[i];
}
if(defaultOp.lastMsgLabel){
if(typeof defaultOp.lastMsgLabel == "string"){
label = document.getElementById(defaultOp.lastMsgLabel);
}
}
if(defaultOp.IsNumber){
area.style.imeMode="Disabled";//IE
area.onkeydown = function(){
return event.keyCode != 229;
}
}
area.onkeyup = function(){
if(defaultOp.IsNumber){
this.value = this.value.replace(/\D/g,"");//IE之外的
}
if(this.value.length > defaultOp.maxLength){
//-------------------------------------------------------------------------------
//方案①
this.disabled = "disabled";
this.value = this.value.slice(0,defaultOp.maxLength);
this.removeAttribute("disabled");
this.focus();
//方案②
//或
//alert(defaultOp.errorMsg);
//this.value = this.value.slice(0,defaultOp.maxLength);
//-------------------------------------------------------------------------------
}
if(label){
label.value = defaultOp.msg.replace(/\{0\}/,defaultOp.maxLength -this.value.length);
}
}
}
</script>
</body>
</html>
解決輸入日語+全形時出現的BUG 主要是在紅線中間的代碼。
思路就是中斷日語的輸入狀態。
用如果輸入超出時能忍受彈窗的話，就用方案②,否則的話就用方案①。
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