function check()
{
 /*  if(checkspace(document.userinfo.pro_name.value)) {
	document.userinfo.pro_name.focus();
    alert("留言标题不能为空");
	return false;
  }*/
     

 

   if(checkspace(document.userinfo.contact.value)) {
	document.userinfo.contact.focus();
    alert("联系人不能为空！");
	return false;
  }
  
         if(checkspace(document.userinfo.phone.value)) {
	document.userinfo.phone.focus();
    alert("手机不能为空！");
	return false;
  }

/* if(document.userinfo.email.value.length!=0)
  {
		if (document.userinfo.email.value.charAt(0)=="." ||        
			 document.userinfo.email.value.charAt(0)=="@"||       
			 document.userinfo.email.value.indexOf('@', 0) == -1 || 
			 document.userinfo.email.value.indexOf('.', 0) == -1 || 
			 document.userinfo.email.value.lastIndexOf("@")==document.userinfo.email.value.length-1 || 
			 document.userinfo.email.value.lastIndexOf(".")==document.userinfo.email.value.length-1)
		 {
		  alert("邮箱格式不对！");
		  document.userinfo.email.focus();
		  return false;
		  }
   }
 else
  {
   alert("邮箱不能为空！");
   document.userinfo.email.focus();
   return false;
   }
*/



/*	if(checkspace(document.userinfo.address.value)) {
		document.userinfo.address.focus();
		alert("地址不能为空！");
		return false;
	 }*/
	if(checkspace(document.userinfo.content.value)) {
		document.userinfo.content.focus();
		alert("留言内容不能为空！");
		return false;
	}
	
/*	if(checkspace(document.userinfo.validate.value)) {
		document.userinfo.validate.focus();
		alert("验证码不能为空！");
		return false;
	}*/
	  
  
}

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

	function regInput(obj, reg, inputStr)
	{
		var docSel	= document.selection.createRange()
		if (docSel.parentElement().tagName != "INPUT")	return false
		oSel = docSel.duplicate()
		oSel.text = ""
		var srcRange	= obj.createTextRange()
		oSel.setEndPoint("StartToStart", srcRange)
		var str = oSel.text + inputStr + srcRange.text.substr(oSel.text.length)
		return reg.test(str)
	}
	
	
function checkRadio(e){//判断是否未被选择 e为 radio的 name
  var radios = document.getElementsByName(e);
  for ( var i = 0; i < radios.length; i++) {
  if (radios[i].checked==true) {
      i++;
	  return true;
   //alert("你选中的是第"+i+"个单选框。值为："+radios[--i].value);
   }
  }
  radios[0].focus();	
   return false;
}