Calander dateselect error

Am using calendardateselect in my code.
I have included in code only after including all 'defaults' javascript
that includes prototype.js.

But still in IE alone, am getting error as prototype not found.

Please let me know what is the reason

Should i need to include prototype.js explicitly?

I suspect the order in which you specified the javascript inclusions.

Please check if dependecies are specified before .

See if defaults is specified before calendardateselect is specified.