php+js+mysql設計の擬webQQ-<2>その他の検証

他の検証が簡単かどうか見てみましょう.
<2>ニックネーム検証
Jsコード

function checkNickname(Nickname)
{	
var xmlhttp;
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  	xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  	xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    { 
document.getElementById("error2").innerHTML="<font color=red size=2px>*</font>";   //  
	   if(Nickname.length==0)
	      {
		  	document.getElementById("error2").innerHTML="<font color=red size=2px>*      ！</font>";
		  }
	   else
	      {
		  	if(Nickname.length>16)
			   {
			   	  document.getElementById("error2").innerHTML="<font color=red size=2px>*      16   ！</font>";
			   }
			 else
			   {
			      document.getElementById("error2").innerHTML="<font color=green size=2px>*    ！</font>";
			   }
		  }
    }
  } 
xmlhttp.open("GET","index.php",true);
xmlhttp.send();         //            
}

<3>パスワード検証
Jsコード

function checkPwd1(password1)
{	
var xmlhttp;
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  	xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  	xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {  document.getElementById("error3").innerHTML="<font color=red size=2px>*</font>";
       document.getElementById("password2").value="";
       document.getElementById("error4").innerHTML="<font color=red size=2px>*</font>";
	   if(password1.length==0)
	      {
		  	document.getElementById("error3").innerHTML="<font color=red size=2px>*      ！</font>";
			
		  }
	   else
	      {
		  	if(password1.length<6||password1.length>16)
			   {
			   	  document.getElementById("error3").innerHTML="<font color=red size=2px>*   6-16   ！</font>";
				  
			   }
			 else
			   {  
			       var reg=/[a-zA-Z0-9]/;     // js        
				   if(reg.test(password1))
			          {
					     document.getElementById("error3").innerHTML="<font color=green size=2px>*    ！</font>";
					   }
				   else
				      {
					  	 document.getElementById("error3").innerHTML="<font color=red size=2px>*     ！</font>";
						 
					  }	   
			   }
		  }
    }
  } 
xmlhttp.open("GET","index.php",true);
xmlhttp.send();
}

<4>パスワード検証の繰返し
Jsコード

function checkPwd2(password2)
{	
var xmlhttp;
if (window.XMLHttpRequest)
  {// code for IE7+, Firefox, Chrome, Opera, Safari
  	xmlhttp=new XMLHttpRequest();
  }
else
  {// code for IE6, IE5
  	xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
xmlhttp.onreadystatechange=function()
  {
  if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {  document.getElementById("error4").innerHTML="<font color=red size=2px>*</font>";
	   if(password2.length==0)
	      {
		  	document.getElementById("error4").innerHTML="<font color=red size=2px>*     ！</font>";
			
		  }
	   else
	      {
		  	if(password2!=document.getElementById("password1").value)
			   {
			   	  document.getElementById("error4").innerHTML="<font color=red size=2px>*         ！</font>";
				  
			   }
			else 
			   {
				  document.getElementById("error4").innerHTML="<font color=green size=2px>*      ！</font>";
			   }
			
		  }
    }
  } 
xmlhttp.open("GET","index.php",true);
xmlhttp.send();
}

どうですか.簡単ですね.(未完待機)