js registration verification problems

In the registration interface wrote some js used to verify mailbox format , mobile format , the submit button is written ;, checkall (); I want to achieve such a function , as long as there is a js validation unsuccessful ( eg mail format is incorrect ) , then press submit, form does not submit a form ( ie not submitted to aciton treatment ) . But in the page display Enter the correct mailbox , phone number and the like . Will this checkall () should be how to write ?
------ Solution ---------------------------------------- ----
if ( unsuccessful ) {
return false;
}
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is what I wrote . So write or submitted to the action ah
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is what I wrote . So write or submitted to the action ah  

code it
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onclick = "checkall ()" checkall submitted method returns true , do not submit returns false .
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  The reply was deleted administrator at 2013-12-12 14:33:37

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is what I wrote . So write or submitted to the action ah          
  
code it  

function checkall()  //检查所有
  {
    
      if(checkname()&&checkuserpassword()&&checkpwdagin()&&checktelephone()&&checkemail())
      {   
          
          return true;
          
      }
      else{
      
      return false;
     }
  }

------ For reference only ----------------------------------- ----
what I wrote . So write or submitted to the action ah                
    
code it          

function checkall()  //检查所有
  {
    
      if(checkname()&&checkuserpassword()&&checkpwdagin()&&checktelephone()&&checkemail())
      {   
          
          return true;
          
      }
      else{
      
      return false;
     }
  }

  know, to be written in the form which onsubmit = "return checkall ()"
------ For reference only --------------- ------------------------
is what I wrote . So write or submitted to the action ah                
    
code it          

function checkall()  //检查所有
  {
    
      if(checkname()&&checkuserpassword()&&checkpwdagin()&&checktelephone()&&checkemail())
      {   
          
          return true;
          
      }
      else{
      
      return false;
     }
  }

 

your various authentication methods are correct you
------ For reference only ---------------------- -----------------
is what I wrote . So write or submitted to the action ah                      
      
code it                

function checkall()  //检查所有
  {
    
      if(checkname()&&checkuserpassword()&&checkpwdagin()&&checktelephone()&&checkemail())
      {   
          
          return true;
          
      }
      else{
      
      return false;
     }
  }

         
  
your various authentication methods are right for you   already.