Hi Preethi,
Not sure weather you want to get the variable type on catalog item or field type on the form but there is no direct way to get the type of the field/variable. If you still want to get the type then you will have to write a gildeajax call to script include and in script include you need to query the dictionary table if form field or variable table if variable to get the type of the field.
Please mark correct if helpful.
Regards,
Vaibhav Dane
