// JavaScript Document
function toggle_visibility(id) {
       var BSM1 = document.getElementById(id);
       if(BSM1.style.display == 'block')
          BSM1.style.display = 'none';
       else
          BSM1.style.display = 'block';
		  
    }
	function toggle_visibility2(id) {
       var BSM2 = document.getElementById(id);
       if(BSM2.style.display == 'block')
          BSM2.style.display = 'none';
       else
          BSM2.style.display = 'block';
		  
    }
	function toggle_visibility3(id) {
       var BSM3 = document.getElementById(id);
       if(BSM3.style.display == 'block')
          BSM3.style.display = 'none';
       else
          BSM3.style.display = 'block';
		  
    }