<script language="javascript" type="text/javascript">
function checkName(){
String.prototype.Trim = function() //给string增加个Trim()方法
{
return this.replace(/(^\s*)|(\s*$)/g, "");
}
String.prototype.LTrim = function() //给string增加个LTrim()方法，去左边的空格
{
return this.replace(/(^\s*)/g, "");
}
String.prototype.RTrim = function() // 给string增加个RTrim()方法，去右边的空格
{
return this.replace(/(\s*$)/g, "");
}
String.prototype.len = function() // 给string增加个len ()方法，计算string的字节数
{
return this.replace(/[^\x00-\xff]/g, "xx").length;
}
var obj=document.getElementById("txtContent").value; //取得textbox里的数据
var count=obj.Trim().len(); //去点空格后计算字节数
if(count<1||obj=="请填写评论的内容！")
{
document.getElementById("U_name_Err1").className="show";
document.getElementById("U_name_Err2").className="unshow";
return false;
}
if(count>1000)
{
document.getElementById("U_name_Err2").className="show";
document.getElementById("U_name_Err1").className="unshow";
return false;
}
else
{
document.getElementById("U_name_Err2").className="unshow";
document.getElementById("U_name_Err1").className="unshow";
}
return true;
}
</script>
