Javascript简单表单验证无效

Question

我一直在努力想出这个简单的代码。我把它归结为IF Firstname为空或== 1，它将ALERT，但最终的IF语句总是响铃为真，并且不会警告false或true。有什么想法吗？

function validateForm()
{
    var firstname=document.getElementById('firstname').value.trim();


var count=0;
if (firstname.length==0)
 { alert("EMPTY");
  document.getElementById("err_firstname").innerHTML="<br><span class='errorbar'>*This is a required field</span>";
  } else  {
   count++; 
   alert("COUNTED");
   document.getElementById("err_firstname").innerHTML="";
  }

  if (count==1)
      {
   return true; 
  alert("true");
   } else {
   document.getElementById("err_allerrors").innerHTML="<br><span class='errorbar'>*There is required information missing. Please enter all required data.</span>";
      return false;
             alert("false");       

     }
    //Verified         
}

Answer 1

在alert()出现问题之前返回