var run=1;  
function login_check() { 
  var ok=1;
  var rc='1px solid #ff0000',orc='1px dashed #a4a4a4';
  var rb='#FFCCCC',orb='#FFFFFF';
 
  if(run) {   
   var frm=document.forms['login'];
     
    var email=frm.elements['email'];
    var emailSymbolsRE=/[^a-zA-Z0-9-_@.]/;
      if(emailSymbolsRE.test(email.value)){email.style.backgroundColor=rb;ok=0;}else {email.style.backgroundColor=orb;} 
      //var emailRE=/^[-!#$%&'*+\/0-9=?A-Z^_a-z{|}~](\.?[-!#$%&'*+\/0-9=?A-Z^_a-z{|}~])*@[a-zA-Z0-9_](\.?-?[a-zA-Z0-9_])*(\.[a-zA-Z](-?[a-zA-Z0-9])*)+$/;
      //if(!emailRE.test(email.value) && !emailSymbolsRE.test(email.value) && email.value)
      //{email.style.border=rc;ok=0;}
      //else {email.style.border=orc;} 
     
    var password=frm.elements['pass']; 
    var passwordSymbolsRE=/[^a-zA-Z0-9]/;
    if(passwordSymbolsRE.test(password.value)){password.style.backgroundColor=rb;ok=0;}else {password.style.backgroundColor=orb;}
    var passwordRE=/[a-zA-Z0-9]{6,}/;
    if(!passwordRE.test(password.value) && !passwordSymbolsRE.test(password.value) && password.value){password.style.border=rc;ok=0;}else {password.style.border=orc;} 

    if(!email.value||!password.value)  ok=0;    
                 
    if(ok==1)frm.sbm.disabled=false;else frm.sbm.disabled=true;
    
  }
  
}