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94 webMathematica User GuideManipulate Example: Slider, Checkbox, and PlotSlider, Checkbox, and PlotNeeds["MSPManipulate`"]MSPManipulateHeader[$$updateArgs, $$manipulateNumber]MSPManipulate[ Plot[ Cos[var+x], {x,0,2Pi}, Frame -> frame], {var, 0,20},{frame, {True,False}}, OutputSize->{621, 384}]There are three key parts to this page. First, the MSPManipulate` package is loaded withNeeds, as shown below. This must be done in its own evaluate tag, and at the start of thepage.Needs["MSPManipulate`"]Secondly, the special header is put down, with a call to MSPManipulateHeader. This must referto the variables $$updateArgs and $$manipulateNumber exactly as shown (note that youcannot rename these variables). MSPManipulateHeader initializes the interactive features.MSPManipulateHeader[$$updateArgs, $$manipulateNumber]Finally, you have to add the actual interactive code. This is done with a call to MSPManipulate;an example follows.