function web_tab(web_tab,web)
{
i=1;
 while (document.getElementById('web_tab_'+i))
  {   
   document.getElementById('web_tab_'+i).style.display='none';
   document.getElementById('web_'+i).className='web-design-heading';   
   i++;
  }
   document.getElementById(web_tab).style.display='block';
   document.getElementById(web).className='select-web-design-heading';
}