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

function checkmess()
{

	var allchecked = true ;
   if(checkspace(document.messinfo.corname.value)) {
	document.messinfo.corname.focus();
    alert("请填写公司名称！");
	allchecked = false;
  } else  if(checkspace(document.messinfo.cornum.value)) {
	document.messinfo.cornum.focus();
    alert("请填写公司员工人数！");
	allchecked = false;
  }
  else  if(document.messinfo.cornum.value.length>40)
      {
	   document.messinfo.cornum.focus();
       alert("公司员工人数不能多于20个字，请重新输入！");
	   allchecked = false;
       }
  else  if(checkspace(document.messinfo.linkman.value)) {
	document.messinfo.linkman.focus();
    alert("请填写联系人！");
	allchecked = false;
  }
   else   if(document.messinfo.linkman.value>40)
      {
	   document.messinfo.linkman.focus();
       alert("联系人信息不能多于20个字，请重新输入！");
	   allchecked = false;
       }
  else  if(checkspace(document.messinfo.tel.value)) {
	document.messinfo.tel.focus();
    alert("请填写联系电话！");
	allchecked = false;
  }
  else  if(document.messinfo.tel.value.length>40)
      {
	   document.messinfo.tel.focus();
       alert("联系电话字数不能多于20个字，请重新输入！");
	   allchecked = false;
       }
  else  if(checkspace(document.messinfo.email.value)) {
	document.messinfo.email.focus();
    alert("请填写email！");
	allchecked = false;
  }else  if(checkspace(document.messinfo.memo.value)) {
	document.messinfo.memo.focus();
    alert("请填写备注！");
	allchecked = false;
  }
  else  if(document.messinfo.memo.value.length>260)
      {
	   document.messinfo.memo.focus();
       alert("备注信息不能多于130个字，请重新输入！");
	   allchecked = false;
       }
  else  if(document.messinfo.corname.value.length>260)
      {
	   document.messinfo.corname.focus();
       alert("公司名称不能多于130个字，请重新输入！");
	   allchecked = false;
       }
  else  if(document.messinfo.email.value.length!=0)
      {
         if (document.messinfo.email.value.charAt(0)=="." ||        
         document.messinfo.email.value.charAt(0)=="@"||       
         document.messinfo.email.value.indexOf('@', 0) == -1 || 
         document.messinfo.email.value.indexOf('.', 0) == -1 || 
         document.messinfo.email.value.lastIndexOf("@")==document.messinfo.email.value.length-1 || 
         document.messinfo.email.value.lastIndexOf(".")==document.messinfo.email.value.length-1)
             {
               alert("Email地址格式不正确！");
               document.messinfo.email.focus();
               allchecked = false;
              }
    }
	
	
	return allchecked;
}