Increase the value of a certain style in style through js_html/css_WEB-ITnose

After clicking the increase button, you want to The height of select1 is increased by 4px, but in fact the height of select does not change after clicking. Please tell me how to write it? Thanks!

Reply to discussion (solution)

document.form1.select1.style.height =parseInt(document.form1.select1.style.height) 4

Thank you upstairs. It's done. It should be like this: document.form1.select1.style.height=parseInt(document.form1.select1.style.height) 4. There is one more upstairs, thank you!