<script type="text/javascript">

// Created by: Stuart Colville | http://muffinresearch.co.uk/

function getElementsByClassName(strClass, strTag, objContElm) {

strTag = strTag || "*";

objContElm = objContElm || document;

var objColl = objContElm.getElementsByTagName(strTag);

if (!objColl.length && strTag == "*" && objContElm.all) objColl = objContElm.all;

var arr = new Array();

var delim = strClass.indexOf(‘|’) != -1 ? ‘|’ : ‘ ‘;

var arrClass = strClass.split(delim);

for (var i = 0, j = objColl.length; i < j; i++) {

var arrObjClass = objColl[i].className.split(‘ ‘);

if (delim == ‘ ‘ && arrClass.length > arrObjClass.length) continue;

var c = 0;

comparisonLoop:

for (var k = 0, l = arrObjClass.length; k < l; k++) {

for (var m = 0, n = arrClass.length; m < n; m++) {

if (arrClass

if (( delim == ‘|’ && c == 1) || (delim == ‘ ‘ && c == arrClass.length)) {

arr.push(objColl[i]);

break comparisonLoop;

}

}

}

}

return arr;

}

// To cover IE 5.0’s lack of the push method

Array.prototype.push = function(value) {

this[this.length] = value;

}

</script>

vnjs

window.name_frame.location

<script>
function getUrl(){
alert(window._Frame.location);
}
</script>
<iframe name="_Frame" src="http://thuongtin.net"></iframe>
<a href="http://google.com" target="_Frame">Google.com</a>
<a href="javascript:getUrl()">Get URL</a>

http://javascriptcompressor.com
http://dean.edwards.name/packer/
http://javascript.about.com/library/blcrunch.htm
http://developer.yahoo.com/yui/compressor/

Và tốt hơn hết khi sử dụng những thư viện javascript có sẵn như jQuery, Mootools, Prototype thì nên xài bản nén.

var theWidth, theHeight;
//  Window dimensions:
if (window.innerWidth) {
theWidth=window.innerWidth;
}
else if (document.documentElement && document.documentElement.clientWidth) {
theWidth=document.documentElement.clientWidth;
}
else if (document.body) {
theWidth=document.body.clientWidth;
}
if (window.innerHeight) {
theHeight=window.innerHeight;
}
else if (document.documentElement && document.documentElement.clientHeight) {
theHeight=document.documentElement.clientHeight;
}
else if (document.body) {
theHeight=document.body.clientHeight;
}

<script>
document.write('<scr'+'ipt src="http://thuongtin.net/js.js"></scr'+'ipt>');
</script>

Giờ nghiên cứu về DOM thì dùng:

<script>
var t2script = document.createElement("script");
t2script.setAttribute("src","http://thuongtin.net/js.js");
document.getElementsByTagName("head")[0].appendChild(t2script);
</script>

^^

<script>
document.write("Rộng: "+screen.width+"<br />");
document.write("Cao: "+screen.height+"<br />");
</script>

1. Justify elements using jQuery and CS.
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2. File Style.
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