用javascript方法，禁止用户操作页面

1. 屏蔽F12 审查元素

// 屏蔽F12 审查元素
document.onkeydown = function(){
 
    if(window.event && window.event.keyCode == 123) {
        alert("F12被禁用");
        event.keyCode=0;
        event.returnValue=false;
    }
    if(window.event && window.event.keyCode == 13) {
        window.event.keyCode = 505;
    }
    if(window.event && window.event.keyCode == 8) {
        alert(str+"\n请使用Del键进行字符的删除操作！");
        window.event.returnValue=false;
    }
 
}
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2. 屏蔽右键菜单

document.oncontextmenu = function (event){
    if(window.event){
        event = window.event;
    }try{
        var the = event.srcElement;
        if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
            return false;
        }
        return true;
    }catch (e){
        return false;
    }
}
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3. 屏蔽粘贴

document.onpaste = function (event){
    if(window.event){
        event = window.event;
    }try{
        var the = event.srcElement;
        if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
            return false;
        }
        return true;
    }catch (e){
        return false;
    }
}
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4. 屏蔽复制

document.oncopy = function (event){
    if(window.event){
        event = window.event;
    }try{
        var the = event.srcElement;
        if(!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
            return false;
        }
        return true;
    }catch (e){
        return false;
    }
}
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5. 屏蔽剪切

// 屏蔽剪切
document.oncut = function (event){
    if(window.event){
        event = window.event;
    }try{
        var the = event.srcElement;
        if(!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
            return false;
        }
        return true;
    }catch (e){
        return false;
    }
}
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6. 屏蔽选中

document.onselectstart = function (event){
    if(window.event){
        event = window.event;
    }try{
        var the = event.srcElement;
        if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
            return false;
        }
        return true;
    } catch (e) {
        return false;
    }
}
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