<script language="javascript">
    
    function isTel(s)   
    {   
        
        [bold]var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;------尤其这一句这种组成格式讲解一下吧[/bold]        if (!patrn.exec(s)) return false;  
        return true;
    }   
  
    function isMobil(s)   
    {   
        [bold]var patrn=/^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;[/bold]        if (!patrn.exec(s)) return false;
        return true;  
    }   

    function isPostalCode(s)//校验邮政编码
    {   
        
        [bold]var patrn=/^[a-zA-Z0-9 ]{3,12}$/;[/bold]        if (!patrn.exec(s)) return false;
        return true;
    }   
</script>

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具体学习一下