for creation of textbox on 
the screen give tag
< input type =text name=txtbox >

for creation of Combobox on 
the screen give tag
< select name= cbobox >
< option value = Apple > Apple </ option >
< option value = Guava > Guava </ option >
< option value = Mango > Mango </ option >
< /select >

for creation of Radio button  
give tag
< input type= radio name= rdobutton > Yes
< input type= radio name= rdobutton > No

for creation of Check Box  
give tag
< input type= Checkbox name= chkbx1 > Apple
< input type= Checkbox name= chkbx2 > Guava
< input type= Checkbox name= chkbx3 > Mango

for creation of Command Button   
give tag
< input type=Button name=Btn1 value=Add > 

for creation of Reset Button which 
resets the content on the screen   
give tag
< input type= Reset name= Rstbtn > 

for creation of Textarea where 
you can type many lines
give tag
< textarea rows=4 width=100 > 
This is the area where you type 
content </ textarea >