<!-- begin
function WHange(ID)
{
 if (ID =="w1") {
 document.getElementById("w1").style.display = "";
 document.getElementById("w2").style.display = "none";
 document.getElementById("w3").style.display = "none";
 document.getElementById("w4").style.display = "none";
return;
}
 if (ID =="w2") {
 document.getElementById("w1").style.display = "none";
 document.getElementById("w2").style.display = "";
 document.getElementById("w3").style.display = "none";
 document.getElementById("w4").style.display = "none";
return;
}
 if (ID =="w3") {
 document.getElementById("w1").style.display = "none";
 document.getElementById("w2").style.display = "none";
 document.getElementById("w3").style.display = "";
 document.getElementById("w4").style.display = "none";
return;
}

 if (ID =="w4") {
 document.getElementById("w1").style.display = "none";
 document.getElementById("w2").style.display = "none";
 document.getElementById("w3").style.display = "none";
 document.getElementById("w4").style.display = "";
return;
}

 if (ID =="w5") {
 document.getElementById("w1").style.display = "none";
 document.getElementById("w2").style.display = "none";
 document.getElementById("w3").style.display = "none";
 document.getElementById("w4").style.display = "none";
return;
}  
} 
// end -->