jQuery height()
set height via px, pt, em
<!DOCTYPE html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"> </script>/*from ww w . ja v a2s .c om*/ <script> $(document).ready(function(){ $("#btn1").click(function(){ $("div").height(500); }); $("#btn2").click(function(){ $("div").height("10em"); }); $("#btn3").click(function(){ $("div").height("200pt"); }); }); </script> </head> <body> <button id="btn1">Set height of div to 500px</button> <button id="btn2">Set height of div to 10em</button> <button id="btn3">Set height of div to 200pt</button> <p><b>Note:</b> Use "" for em, pt, etc.</p> <div style="height:100px;background-color:lightblue;"></div><br> </body> </html>