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function keyDown(){
//ÆÁ±ÎÊó±êÓÒ¼ü¡¢Ctrl+n¡¢shift+F10¡¢F5ˢС¢Í˸ñ¼ü
//alert("ASCII´úÂëÊÇ£º"+event.keyCode);
if ((window.event.altKey)&&
((window.event.keyCode==37)|| //ÆÁ±Î Alt+ ·½Ïò¼ü ←
(window.event.keyCode==39))){ //ÆÁ±Î Alt+ ·½Ïò¼ü →
alert("²»×¼ÄãʹÓÃALT+·½Ïò¼üǰ½ø»òºóÍËÍøÒ³£¡");
event.returnValue=false;
}
if ((event.keyCode==8) || //ÆÁ±ÎÍ˸ñɾ³ý¼ü
(event.keyCode==116)|| //ÆÁ±Î F5 ˢмü
(event.keyCode==112)|| //ÆÁ±Î F1 ˢмü
(event.ctrlKey && event.keyCode==82)){ //Ctrl + R
event.keyCode=0;
event.returnValue=false;
}
if ((event.ctrlKey)&&(event.keyCode==78)) //ÆÁ±Î Ctrl+n
event.returnValue=false;
if ((event.shiftKey)&&(event.keyCode==121)) //ÆÁ±Î shift+F10
event.returnValue=false;
if (window.event.srcElement.tagName == "A" && window.event.shiftKey)
window.event.returnValue = false; //ÆÁ±Î shift ¼ÓÊó±ê×ó¼üпªÒ»ÍøÒ³
if ((window.event.altKey)&&(window.event.keyCode==115)){ //ÆÁ±ÎAlt+F4
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
return false;}
}
document.onkeydown=keyDown;
<body oncontextmenu="window.event.returnValue=false" onselectstart="return false">
document.onselectstart=new Function("self.event.returnValue=false");
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var a = "hello";
var b = ",world";
var c = a.concat(b);
alert(c);
//c = "hello,world"
indexOf
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var deleteArray = new Array();
var cnt = 0;
for (i = 0; i < document.forms[0].elements.length; i++ ) {
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=gb2312">
<title>JS»ñÈ¡¿Í»§¶ËIP</title>
</head>
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