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;

}

}