var xOffset = 0;

function sw(ca,ca1) {
     document.images[ca].src=ca1
     stlink.style.visibility="hidden"
     proglink.style.visibility="hidden"
     frlink.style.visibility="hidden"
}  
   
function sw1(ca,ca1) {
     document.images[ca].src=ca1
     stlink.style.visibility="hidden"
     proglink.style.visibility="hidden"
     frlink.style.visibility="hidden"
}

function ww1(ca,ca1){
     document.images[ca].src=ca1
}
  
 function ww2(ca,ca1)
 {
     document.images[ca].src=ca1
 }

 function sw2(ca,ca1)
   {
     document.images[ca].src=ca1
     stlink.style.visibility="hidden"
   }
   
 function sw3(ca,ca1)
   {
     document.images[ca].src=ca1
     proglink.style.visibility="hidden"
   }

 function sw4(ca,ca1)
   {
     document.images[ca].src=ca1
     stlink.style.visibility="hidden"
   }


function hid()
{
     stlink.style.visibility="hidden"
     proglink.style.visibility="hidden"
     frlink.style.visibility="hidden"
}

function ww1(ca,ca1)
{
     proglink.style.left = document.getElementById('mainTable').offsetLeft + 0;
     proglink.style.visibility="visible"
     stlink.style.visibility="hidden"
     frlink.style.visibility="hidden"
     document.images[ca].src=ca1
}

function ww2(ca,ca1)
{

     stlink.style.left = document.getElementById('mainTable').offsetLeft + 343;
     proglink.style.visibility="hidden"
     frlink.style.visibility="hidden"
     stlink.style.visibility="visible"
     document.images[ca].src=ca1
}


function ww3(ca,ca1)
{

     frlink.style.left = document.getElementById('mainTable').offsetLeft + 448;
     proglink.style.visibility="hidden"
     stlink.style.visibility="hidden"
     frlink.style.visibility="visible"
     document.images[ca].src=ca1
}