function textLimitCheck(thisArea, maxLength){
    if (thisArea.value.length > maxLength){
      alert(maxLength + ' 个字限制. \r超出的将自动去除.');
      thisArea.value = thisArea.value.substring(0, maxLength);
      thisArea.focus();
    }
    /*回写span的值，当前填写文字的数量*/
    messageCount.innerText = thisArea.value.length;
  }

function checkdata() {
if( addform.title.value =="") {
alert("\提交出错，下面是产生错误的可能原因：\n\n·请输入完整的标题")
document.addform.title.focus();
return false;
}
if( addform.content.value =="" || addform.content.value.length<1) {
alert("\提交出错，下面是产生错误的可能原因：\n\n·内容不能为空")
document.addform.content.focus();
return false;
}
if( addform.name.value =="") {
alert("\提交出错，下面是产生错误的可能原因：\n\n·请输入联系人")
document.addform.name.focus();
return false;
}
if(isNumberString(addform.phone.value,"1234567890-")!=1 || addform.phone.value =="" || addform.phone.value.length<7) {
alert("\提交出错，下面是产生错误的可能原因：\n\n·请正确输入电话")
document.addform.phone.focus();
return false;
}
var myReg=/[_a-zA-Z\d\-\.]+@[_a-zA-Z\d\-]+(\.[_a-zA-Z\d\-]+)+$/;
if(!myReg.test(addform.email.value)) {
alert("\提交出错，下面是产生错误的可能原因：\n\n·请输入正确的E-mail")
document.addform.email.focus();
return false;
}
return true;
}
function isNumberString (InString,RefString)
{
if(InString.length==0) return (false);
for (Count=0; Count < InString.length; Count++)  {
	TempChar= InString.substring (Count, Count+1);
	if (RefString.indexOf (TempChar, 0)==-1)  
	return (false);
}
return (true);
}