//验证码
function refreshimg(){
  document.all.GetCode.src='/include/validatecode.asp';
}

//图片预览
function ipreview()
{
var fileext=document.thisForm.picture.value.substring(document.thisForm.picture.value.lastIndexOf("."),document.thisForm.picture.value.length)
        fileext=fileext.toLowerCase()
    
        if ((fileext!='.jpg')&&(fileext!='.gif')&&(fileext!='.jpeg')&&(fileext!='.png')&&(fileext!='.bmp'))
        {
            alert("图片格式错误，请您调整格式后重新上传。");
             document.thisForm.picture.focus();
        }
        else
        {
		document.getElementById("preview").innerHTML="<img src='"+document.thisForm.picture.value+"' style='border:2px double #ccc;width:80px;';padding:5px;>"
        }
}