app.activeDocument.characterStyles.itemByName("ZF1").underline = true; 
app.activeDocument.characterStyles.itemByName("ZF2").underline = true; 
...usw.... 

app.documents[0]. 
	characterStyleGroups.itemByName("GroupName"). 
	characterStyles.itemByName("ZF1"). 
	underline = true; 

/*WpsStylesClass*/wpsStyles = new WpsStylesClass({root: app.activeDocument, type: "character"}); 
// Array of objects with properties group, style 
// e.g. stylesByName[index].group, stylesByName[index].style 
/*Array*/stylesByName = wpsStyles.getStylesByName("Bold"); 
alert(stylesByName); 

#include "WpsStylesClass.jsx"; 
/*WpsStylesClass*/wpsStyles = new WpsStylesClass({root: app.activeDocument, type: "character"});  
// Array of objects with properties group, style  
// e.g. stylesByName[index].group, stylesByName[index].style  
/*Array*/stylesByName = wpsStyles.getStylesByName("Bold");  
alert(stylesByName);