#target indesign 
if (app.documents.length != 0){ 
	if (app.selection.length == 1){ 
		var s = app.selection[0].constructor.name; 
		switch (app.selection[0].constructor.name){ 
			case "Text": 
			case "InsertionPoint": 
			case "Character": 
			case "Word": 
			case "Line": 
			case "TextStyleRange": 
			case "TextColumn": 
			case "Paragraph": 
				app.select( app.selection[0].parentTextFrames[0] ); 
				main(); 
				break; 
			case "TextFrame": 
				main(); 
				break; 
			default: 
		} 
	} 
	else{ 
	} 
} 
else{ 
} 
 
 
function main() { 
	var tf = app.selection[0]; 
	var story = tf.parentStory; 
	var lines = story.lines.everyItem().getElements(); 
	for ( var n = lines.length-1; n >= 0; n--) { 
		if (lines[n].characters.lastItem().contents == " ") { 
			lines[n].characters.lastItem().underline = false; 
		} 
	} 
}