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JS to obtain and modify the Web page background color and font color method _javascript Tips

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This article is an example of JS to obtain and modify the Web page background color and font color methods. Share to everyone for your reference, specific as follows:

Get the background color and font color of the Web page as follows:

Thought: By getting the color attribute is worth to the RGB color, not what we want, so you need to change the RGB color to hexadecimal color, first get RGB color:

The code is as follows:

Copy Code code as follows:
var RGB = document.getElementById (' color '). Style.backgroundcolor;

The resulting format is as follows: RGB (225, 22, 23); And then split the break:

The code is as follows:

Copy Code code as follows:
var RGB = Rgb.split (' (') [1];////[RGB, 225,22,23)] form, array of length 2

The (225,22,23) string is then split (note: Only the number type can be converted, so use parseint to cast the type!). ） ：

The code is as follows:

for (var k = 0; k < 3; k++) {
Str[k] = parseint (RGB. Split (', ') [K]). toString;//str array save split data
}

The final combination:

The code is as follows:

Copy Code code as follows:
str = ' # ' +str[0]+str[1]+str[2];

The complete code is as follows: 

<! DOCTYPE html>

The

Use JavaScript to change the background color is as follows: 

<body leftmargin=5 topmargin=0 onmouseover= "document_onmouseover ();"
Onclick= "Document_onclick ();" id= "All" > <script language= "javascript" > var curobj= null;
var curobjmouseover=null; function Document_onclick () {if (window.event.srcelement.tagname== ' A ') | | window.event.srcelement.tagname== ' FONT ') {if (curobjmouseover!=null) curobjmouseover.style.background= '; if (
curobj!=null) curobj.style.background= ';
Curobj=window.event.srcelement;
  Curobj.style.background= ' #ff0099 '; }} function Document_onmouseover () {if (window.event.srcelement.tagname== ' A ' | | |
window.event.srcelement.tagname== ' FONT ') {if (curobjmouseover!=null) {curobjmouseover.style.background= ';
Curobjmouseover.style.color= ' #000000 ';}
if (curobj!=null) curobj.style.background= ';
Curobjmouseover=window.event.srcelement;
Curobjmouseover.style.background= ' #cccc00 ';
  Curobjmouseover.style.color= ' #ffffff '; } </SCRIPT> <div> <a href= ' # ' > from Cloud Habitat </a> </div> <div> <a href= ' # ' > From Cloud HabitatDistrict </a> </div>

I hope this article will help you with your JavaScript programming.

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