JavaScript code for Table to change color on alternate rows_javascript skills

Effect demonstration code:

<table id="datatable"> <tr> <td>脚本之家</td> </tr> <tr> <td>www.jb51.net</td> </tr> <tr> <td>脚本之家</td> </tr> <tr> <td>www.jb51.net</td> </tr> <tr> <td>脚本之家</td> </tr> <tr> <td>www.jb51.net</td> </tr> <tr> <td>脚本之家</td> </tr> <tr> <td>www.jb51.net</td> </tr> </table>
[Ctrl A Select all Note:If you need to introduce external Js, you need to refresh to execute it

]

Core code:

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The code is as follows:

function showtable(){
var color1 = "rgb(234,240,255 )";
var color2 = "rgb(255,255,255)";
var bgColor = "rgb(255,255,193)";
var trs = document.getElementById("datatable").getElementsByTagName("tr") ;
for (var i=0;iif (i%2==0) {
trs[i].style.backgroundColor=color1;
trs[i].onmouseover = function(){
this.style.backgroundColor = bgColor;
}
trs[i].onmouseout = function(){
this.style.backgroundColor = color1;
}
} else {
trs[i].style.backgroundColor=color2;
trs[i].onmouseover = function(){
this.style.backgroundColor = bgColor;
}
trs[i].onmouseout = function(){
this.style.backgroundColor = color2;
}
}
}
}

<script> function showtable(){ var color1 = "rgb(234,240,255)"; var color2 = "rgb(255,255,255)"; var bgColor = "rgb(255,255,193)"; var trs = document.getElementById("datatable").getElementsByTagName("tr"); for (var i=0;i<trs.length-1;i++){ if (i%2==0) { trs[i].style.backgroundColor=color1; trs[i].onmouseover = function(){ this.style.backgroundColor = bgColor; } trs[i].onmouseout = function(){ this.style.backgroundColor = color1; } } else { trs[i].style.backgroundColor=color2; trs[i].onmouseover = function(){ this.style.backgroundColor = bgColor; } trs[i].onmouseout = function(){ this.style.backgroundColor = color2; } } } } showtable() </script>