//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;

}

};




//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;

}

};



//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;

}

};


//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;

}

};


//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;

}

};