<div class='CodeView'>
select * from tbl_user where user_id = 1;
</div>
......
var divs = document.getElementByTagName('DIV');
for (var i = 0; i < divs.length; i++){
if (divs[i].className == 'CodeView'){
var text = divs[i].innerText;
text.replace(/(select|from|where)/g,'<font color="blue">$1</font>');
divs[i].innerHTML = text;
}
}
......
以此类推