Thinkbuttons  
 
This is a collection of scripts that may be used for building interactive courseware. You can use the scripts for free. However, we would be happy if you could mention the source in the acknowledgements.  
Thinkbuttons are used to break the reading of the user, give him a chance to think over how the sentence may be completed and then check the solution by clicking the button. 
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Thinkbuttons are used to  the reading of the user, give him a chance to think over how the sentence may be  and then check the solution by clicking the 
Better examples are here.
The source 
<form>
Think buttons are used to 
<INPUT type=button value=" . . . . " onClick='this.value=" break ";'>
the reading of the user, give him a chance to think over how the sentence may be
<INPUT type=button value=" . . . . . . . " onClick='this.value=" completed ";'>
and then check the solution by clicking the
<INPUT type=button value=" . . . . " onClick='this.value=" button ";'>
</form>
 

Stefan Krumm 
Institut für Geologie, Schloßgarten 5, 91054 Erlangen 
krumm@geol.uni-erlangen.de