Figure 1.
Step 1
Define a variable by creating a META REFRESH tag to store data in. The example in Figure 1 (" TempVar.htm" ) uses the following META REFRESH tag to create a variable with the name MetaOne:
< META HTTP-EQUIV=" REFRESH" CONTENT=" 0 URL=Amulet:NOP() NAME=MetaOne VALUE=0" >
It is not required to define an initial value, but this example does by setting VALUE to 0.
Step 2
Now that variable MetaOne is defined, it's time to read and write to the variable. " TempVar.htm" uses two Amulet widgets to read and write to MetaOne. To read the value stored in MetaOne, the ImageBar widget uses the following href value:
< PARAM NAME=" href" VALUE= " Amulet:document.MetaOne.byteValue()" >
The ImageBar widget uses the value returned by MetaOne to know what percentages of the full and empty images to display. In order to write a value to MetaOne, the Slider widget uses the following href value:
< PARAM NAME=" href" VALUE= " Amulet:document.MetaOne.setByteValue()" >
Each time the handle on the Slider widget is moved, the widget writes a corresponding value to MetaOne.
Step 3
Now save, compile, and program " TempVar.htm" into the Amulet Module. Upon programming the Amulet Module, play with the slider to see that there really is a variable resident in the module which holds data from the Slider widget.
