question: protected void drawSegment ( int x0 , int y0 , int x1 , int y1 , String strokeColor , int strokeWidth ) { int tmpX = Math . min ( x0 , x1 ) ; int tmpY = Math . min ( y0 , y1 ) ; int width = Math . max ( x0 , x1 ) - tmpX ; int height = Math . max ( y0 , y1 ) - tmpY ; x0 = tmpX ; y0 = tmpY ; if ( width == 0 || height == 0 ) { String s = "overflow:hidden;position:absolute;" + "left:" + String . valueOf ( x0 ) + "px;" + "top:" + String . valueOf ( y0 ) + "px;" + "width:" + String . valueOf ( width ) + "px;" + "height:" + String . valueOf ( height ) + "px;" + "border-color:" + strokeColor + ";" + "border-style:solid;" + "border-width:1 1 0 0px;" ; Element elem = document . createElement ( "div" ) ; elem . setAttribute ( "style" , s ) ; appendHtmlElement ( elem ) ; } else { int x = x0 + ( x1 - x0 ) / 2 ; drawSegment ( x0 , y0 , x , y0 , strokeColor , strokeWidth ) ; drawSegment ( x , y0 , x , y1 , strokeColor , strokeWidth ) ; drawSegment ( x , y1 , x1 , y1 , strokeColor , strokeWidth ) ; } }
target:  Draws the specified segment of a line.