javascript的用法
1.检验身份证号码
2.显示按键以及ACSII码
<script>
3.IE中拷贝代码
4.执行代码和保存代码
5.禁止选择、拷贝代码
6.可拖动的图片
<SCRIPT language="JavaScript">
<!--
function checkIdNO(idStr){
//validate idStr if it contains 18 number character
if(! idStr.match(new RegExp("[0-9]{18}"))){
return false;
}
var length = idStr.length;
//W[i] = 2^(i-1) mod 11
var wi = [7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2];
var ai = ['1','0','X','9','8','7','6','5','4','3','2'];
var idArr = [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0];
var sum = 0;
var mod = 0;
for(i=0;i<length-1;i++){
idArr[i]=parseInt(idStr.charAt(i));
sum += idArr[i] * wi[i];
}
mod = sum % 11 ;
if(ai[mod] == idStr.charAt(length-1)){
return true;
}else{
return false;
}
}
//-->
</script>
2.显示按键以及ACSII码
<script>
function keydown()
{
var keycode=event.keyCode
var Realkey=String.fromCharCode(event.keyCode)
showkeycode.value='按键: '+Realkey+'\nASCII码: '+keycode
document.form1.realkey.value='按键: '+Realkey
document.form1.code.value='ASCII码: '+keycode
}
document.onkeypress=keydown //onkeypress事件对应小写字母等，不包含Ctrl、Shift、Caps、Tab
document.onkeydown=keydown //onkeydown事件对应大写字母等，包含……
</script>
3.IE中拷贝代码
<script language=JavaScript>
<!--
function copyUrl(url){
var content='';
window.clipboardData.setData("Text",url);
alert("复制成功，请粘贴到你的QQ/MSN上推荐给你的好友");
}
//-->
</script>
4.执行代码和保存代码
<SCRIPT>
function runCode(obj)
{
var code=obj.value;
var newwin=window.open('','','');
newwin.opener = null;
newwin.document.write(code);
newwin.document.close();
}
function saveCode(obj) {
var newwin = window.open('', '_blank', 'top=10000');
newwin.document.open('text/html', 'replace');
newwin.document.write(obj.value);
newwin.document.execCommand('saveas','','code.htm');
newwin.close();
}
</script>
5.禁止选择、拷贝代码
<TEXTAREA name=run0 > oncontextmenu="return false" ondragstart="return false" onselectstart ="return false" onselect="document.selection.empty()" oncopy="document.selection.empty()" onbeforecopy="return false" onmouseup="document.selection.empty()" </TEXTAREA>
6.可拖动的图片
<HTML>
<HEAD>
<script language="javascript">
function moveImage(){
if(window.event.button!=1){
return;
}
with(window.event.srcElement.style){
//重新设置图像在浏览器中的位置
pixelLeft=window.event.x-236/2-document.all.ImageDiv.offsetLeft;
pixelTop=window.event.y-118/2-document.all.ImageDiv.offsetTop;
}
window.event.returnValue=false;//取消系统拖动事件
}
</script>
</HEAD>
<BODY>
<div style="position:relative" id="ImageDiv">
<img id="image2" style="container:positioned;position:absolute;top:60px;left:250px;width:236px;height:108px;" src="Hello2.jpg">
<img id="image2" style="container:positioned;position:absolute;top:60px;left:60px;width:236px;height:108px;" src="Hello3.jpg" onmouseMove="moveImage()">
</div>
</BODY>
</HTML>