textarea maxlength
function ismaxlength(obj){
var mlength=obj.getAttribute? parseInt(obj.getAttribute("maxlength")) : ""
if (obj.getAttribute && obj.value.length>mlength)
obj.value=obj.value.substring(0,mlength)
}
maxlength="40" onkeyup="return ismaxlength(this)"
function limitC(obj){
var maxChar=500;
while(obj.value.length>maxChar){
obj.value=obj.value.replace(/.$/,'')
}
}
onkeyup="limitC(this)"
function controlTextAreaMaxLenght(sender)
{
if(sender.value.length > 10)
{
event.keyCode=0;
}
}
<textarea id="a" onkeypress="controllenght(this)" ></textarea>
//可限制中文,但對鼠標粘貼無效
function textlimit(Obj,maxLength)
{
var obj = eval(Obj);
if (obj.value.length >=maxLength)
obj.value=obj.value.substring(0,maxLength-1);
}
<textarea id="Textarea2" onkeyup="textlimit(this, 10)" onkeypress="textlimit(this, 10)"></textarea>
<!--目前為止,所找到的最好控制textarea長度的方法-->
<textarea id="txtArea1" onpropertychange="if(this.value.length>10) this.value=this.value.substr(0,10)" cols="36" rows="3" runat="server"></textarea>
想了解更多onpropertychange相關知識的,請參考: http://hi.baidu.com/crp8/blog/item/b5aa3d734bd6fa1a8701b035.html
var mlength=obj.getAttribute? parseInt(obj.getAttribute("maxlength")) : ""
if (obj.getAttribute && obj.value.length>mlength)
obj.value=obj.value.substring(0,mlength)
}
maxlength="40" onkeyup="return ismaxlength(this)"
function limitC(obj){
var maxChar=500;
while(obj.value.length>maxChar){
obj.value=obj.value.replace(/.$/,'')
}
}
onkeyup="limitC(this)"
function controlTextAreaMaxLenght(sender)
{
if(sender.value.length > 10)
{
event.keyCode=0;
}
}
<textarea id="a" onkeypress="controllenght(this)" ></textarea>
//可限制中文,但對鼠標粘貼無效
function textlimit(Obj,maxLength)
{
var obj = eval(Obj);
if (obj.value.length >=maxLength)
obj.value=obj.value.substring(0,maxLength-1);
}
<textarea id="Textarea2" onkeyup="textlimit(this, 10)" onkeypress="textlimit(this, 10)"></textarea>
<!--目前為止,所找到的最好控制textarea長度的方法-->
<textarea id="txtArea1" onpropertychange="if(this.value.length>10) this.value=this.value.substr(0,10)" cols="36" rows="3" runat="server"></textarea>
想了解更多onpropertychange相關知識的,請參考: http://hi.baidu.com/crp8/blog/item/b5aa3d734bd6fa1a8701b035.html