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| function document.oncontextmenu(){event.returnValue=false;}
function window.onhelp(){return false}
function document.onkeydown(){ if((window.event.altKey)&&((window.event.keyCode==37)||
(window.event.keyCode==39))){
alert("不准你使用ALT+方向键前进或后退网页!"); event.returnValue=false; } if((event.keyCode==8)||
(event.keyCode==116)||
(event.ctrlKey && event.keyCode==82)){
event.keyCode=0; event.returnValue=false; } if(event.keyCode==122){event.keyCode=0;event.returnValue=false;}
if(event.ctrlKey && event.keyCode==78)event.returnValue=false;
if(event.shiftKey && event.keyCode==121)event.returnValue=false;
if(window.event.srcElement.tagName=="A" && window.event.shiftKey) window.event.returnValue=false;
if((window.event.altKey)&&(window.event.keyCode==115)){
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); return false; } }
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