Native JS operates the web page to add onclick events to the p element and change the color of the table every other row

1. Add onclick events to all p elements in the web page: Copy the code The code is as follows: Insert title here

--&gt ; window.onload=function(){ var items=document.getElementsByTagName("p"); for(i=0 ;i items[i].onclick=function(){ alert("Click successfully..."); } } } Test paragraph one...

Test Paragraph two...

Test paragraph three...

2. Make a specific table change color every other row: Copy the code The code is as follows: Insert title here

--&gt ; window.onload=function(){ var item=document.getElementById("tb"); var tbody=item. getElementsByTagName("tbody")[0]; var trs=tbody.getElementsByTagName("tr"); for(var i=0;i if(i %2==0){ trs[i].style.backgroundColor="green"; } } } First row Second line Third line The fourth line The fifth line The sixth line