function get_check_value()
{
var c_value = "";
for (var i=0; i < document.searchform.c1.length; i++)
   {
   if (document.searchform.c1[i].checked)
      {
      alert(12);
      c_value = c_value + document.searchform.c1[i].value + "\n";
      }
   }
}