function showIt(div){
    if (document.getElementById) {  // for Netscape
      myDiv = document.getElementById(div);
         myDiv.style.display = 'block';
    }

    if (document.all) {     // for IE
      eval("myDiv = "+div+";");
         myDiv.style.display = 'block';
    }
}

function hideIt(div){
     if (document.getElementById) {  // for Netscape
       myDiv = document.getElementById(div);
          myDiv.style.display = 'none';
     }

     if (document.all) {     // for IE
       eval("myDiv = "+div+";");
          myDiv.style.display = 'none';
     }
}

function checkMemberType() {
     var  mem_value = document.getElementById('membership_type'); 
     var  f_value = mem_value.options[mem_value.selectedIndex].value;
    
     if (f_value == 'Corporate Sponsored' || f_value == 'Affiliate Organization') {
	showIt('sponsor_text');
     } else {
        hideIt('sponsor_text');
     }	
}