document.write("<p style=\"line-height : normal ; border-top:1px solid orange; border-bottom:1px solid orange; margin:1em;\">line-height : normal ;</p>");
document.write("<p style=\"line-height : 2 ; border-top:1px solid orange; border-bottom:1px solid orange; margin:2em 1em 1em 1em;\">line-height : 2 ;</p>");
document.write("<p style=\"line-height : 3.5 ; border-top:1px solid orange; border-bottom:1px solid orange; margin:2em 1em 1em 1em;\">line-height : 3.5 ;</p>");