您可以使用线性梯度.

如果百分比是40％：

table{

background: -webkit-gradient(linear, left top, right top, color-stop(40%,#F00), color-stop(40%,#00F));

background: -moz-linear-gradient(left center, #F00 40%, #00F 40%);

background: -o-linear-gradient(left, #F00 40%, #00F 40%);

background: linear-gradient(to right, #F00 40%, #00F 40%);

}

所以,在JavaScript中,

var percentage=40,

col1="#F00",

col2="#00F";

var t=document.getElementById('table');

t.style.background = "-webkit-gradient(linear, left top,right top, color-stop("+percentage+"%,"+col1+"), color-stop("+percentage+"%,"+col2+"))";

t.style.background = "-moz-linear-gradient(left center,"+col1+" "+percentage+"%, "+col2+" "+percentage+"%)";

t.style.background = "-o-linear-gradient(left,"+col1+" "+percentage+"%, "+col2+" "+percentage+"%)";

t.style.background = "linear-gradient(to right,"+col1+" "+percentage+"%, "+col2+" "+percentage+"%)";

如果要将其应用于每一行的方式不同：

var col1="#F00",

col2="#00F";

var els=document.getElementById('table').getElementsByTagName('tr');

for (var i=0; i

var percentage = Number(els[i].getElementsByTagName('td')[1].firstChild.nodeValue);

els[i].style.background = "-webkit-gradient(linear, left top,right top, color-stop("+percentage+"%,"+col1+"), color-stop("+percentage+"%,"+col2+"))";

els[i].style.background = "-moz-linear-gradient(left center,"+col1+" "+percentage+"%, "+col2+" "+percentage+"%)" ;

els[i].style.background = "-o-linear-gradient(left,"+col1+" "+percentage+"%, "+col2+" "+percentage+"%)";

els[i].style.background = "linear-gradient(to right,"+col1+" "+percentage+"%, "+col2+" "+percentage+"%)" ;

}

问题是将背景设置为tr可以很好地在Firefox和Opera上运行,但是在Chrome上,渐变应用于每个单元格.

#table td {display: inline-block;}