function checkspace(checkstr) {
  var str = '';
  for(i = 0; i < checkstr.length; i++) {
    str = str + ' ';
  }
  return (str == checkstr);
}

function Surveycheck()
{
  if(checkspace(document.Surveyform.username.value)) {
  document.Surveyform.username.focus();
  alert("请填写您的姓名！");
	return false;
  }
  if(checkspace(document.Surveyform.address.value)) {
  document.Surveyform.address.focus();
  alert("请填写您的公司名称！");
	return false;
  }
  if(checkspace(document.Surveyform.tel.value)) {
  document.Surveyform.tel.focus();
  alert("请填写您的联系电话！");
	return false;
  }
  if(checkspace(document.Surveyform.d_s.value)) {
  document.Surveyform.d_s.focus();
  alert("请填写您的项目名称！");
	return false;
  }
  if(checkspace(document.Surveyform.yj.value)) {
  document.Surveyform.yj.focus();
  alert("请填写您的意见或建议！");
	return false;
  }
}

function bookcheck()
{
  if(checkspace(username.bookform.username.value)) {
  document.bookform.PName.focus();
  alert("请填写您的姓名！");
	return false;
  }
  if(checkspace(document.bookform.email.value)) {
  document.bookform.email.focus();
  alert("请填写电子邮件！");
	return false;
  }
  if(checkspace(document.bookform.content.value)) {
  document.bookform.content.focus();
  alert("请填写留言内容！");
	return false;
  }
}
//-->
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
<!--
function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
//-->

//Flash
function Swfno(FlashSrc,FlashWidth,FlashHeight){
document.write("<embed src=\""+FlashSrc+"\" quality=\"high\" width=\""+FlashWidth+"\" height=\""+FlashHeight+"\" wmode=\"transparent\" TYPE=\"application/x-shockwave-flash\" PLUGINSPAGE=\"http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash\"></embed>");
}
//====================================================================//