"<div id='demodiv' style='width: 640; height: 350; border: 1px solid black'></div>" +
"<p>A single y-axis:</p>" +
"<div id='demodiv_one' style='width: 640; height: 350; border: 1px solid black'></div>" +
"<div id='demodiv' style='width: 640; height: 350; border: 1px solid black'></div>" +
"<p>A single y-axis:</p>" +
"<div id='demodiv_one' style='width: 640; height: 350; border: 1px solid black'></div>" +