// JavaScript Document
function check()
{
	var user=document.getElementById("name");
	var links=document.getElementById("link");
	var email=document.getElementById("email");
	var code=document.getElementById("code");
	
	var pattern=/^[a-z0-9_\+-]+(\.[a-z0-9_\+-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*\.([a-z]{2,7})$/
	
	if (user.value=="" || user.value=="undefined")
	{
		document.getElementById("name_msg").innerHTML="Please enter your name";
		document.getElementById("link_msg").innerHTML="";
		document.getElementById("mail_msg").innerHTML="";
		document.getElementById("code_msg").innerHTML="";
		
		user.focus();
		return false; 
	} 
	else if (links.value=="" || links.value=="undefined")
	{
		document.getElementById("name_msg").innerHTML="";
		document.getElementById("link_msg").innerHTML="Please enter your link";
		document.getElementById("mail_msg").innerHTML="";
		document.getElementById("code_msg").innerHTML="";
		
		links.focus();
		return false; 
	} 
	else if (email.value=="" || email.value=="undefined")
	{
		document.getElementById("name_msg").innerHTML="";
		document.getElementById("link_msg").innerHTML="";
		document.getElementById("mail_msg").innerHTML="Please enter your email";
		document.getElementById("code_msg").innerHTML="";
		
		email.focus();
		return false; 
	} 
	else if (email.value.search(pattern)==-1)
	{
		document.getElementById("name_msg").innerHTML="";
		document.getElementById("link_msg").innerHTML="";
		document.getElementById("mail_msg").innerHTML="Email is invalid";
		document.getElementById("code_msg").innerHTML="";
		
		email.focus();
		return false; 
	} 
	else if (code.value=="" || code.value=="undefined")
	{
		document.getElementById("name_msg").innerHTML="";
		document.getElementById("link_msg").innerHTML="";
		document.getElementById("mail_msg").innerHTML="";
		document.getElementById("code_msg").innerHTML="Please enter image code";
		
		code.focus();
		return false; 
	} 
	
}