Toggling DIV's with Prototype

1:  <script src="prototype.js"></script>  
2:  <script>  
3:       //exmaple: toggleDivs('myDiv,OtherDiv');  
4:       function toggleDivs(divs)  
5:       {  
6:            var divSplit = divs.split(",");  
7:            for(i=0;i<divSplit.length;i++)  
8:            {  
9:                 var d = $(divSplit[i]);  
10:                 if($(d).visible())  
11:                 {  
12:                      d.hide();  
13:                 } else {  
14:                      d.show();  
15:                 }  
16:            }  
17:       }  
18:       //example: checkForm('myForm');  
19:       function checkForm(frm)  
20:       {  
21:            allFields = Form.getElements("myForm");  
22:            for(i=0;i<allFields.length;i++)  
23:            {  
24:                 if(allFields[i].value == "")  
25:                 {  
26:                      $(allFields[i]).addClassName('error');  
27:                 } else {  
28:                      $(allFields[i]).removeClassName('error')  
29:                 }  
30:            }  
31:       }  
32:  </script>