Is there a more efficient way to do this?

var Int_Mod = this.getField("INT_Total"); 
var button_color = this.getField("01").fillColor;
if (button_color.toString() == ["RGB", 1, 1, 1])
{ 
app.alert("Switch color to Grey, +1 to INT Modifiers");
Int_Mod.value = (this.getField("INT_Total").value - 1);
this.getField("01").fillColor = ["RGB", .5 ,.5 ,.5 ];
}
else if (button_color.toString() == ["RGB", .5, .5, .5] )
 {
 app.alert("Switch color to Red, +5 to INT Modifiers");
Int_Mod.value = (this.getField("INT_Total").value - 4);
 this.getField("01").fillColor = ["RGB", 1, 0, 0 ];
 }
 else if (button_color.toString() == ["RGB",1, 0, 0])
 {
 app.alert("Switch color to Black, set INT Modifier to 0");
Int_Mod.value = (this.getField("INT_Total").value + 5);
 this.getField("01").fillColor = ["RGB", 0, 0, 0 ];
 }
 else if (button_color.toString() == ["RGB", 0, 0, 0] )
 {
 app.alert("Switch color to White, 0 INT Modifiers");
 this.getField("01").fillColor = ["RGB", 1, 1, 1];
 }
 else
 {
 this.getField("01").fillColor = ["RGB",1,1,1] // in case color is not white when button created
 app.alert("default to white")
 }

I need about 20 buttons with this code in the Mouse Up Event.  Each button will affect one text field.  I'm wondering if there is a better way to do this, maybe a switch/case?  I don't want to cut/paste/edit the code for each button.

Thank you for looking at this.