function init() { document.Onkeydown= showKeyDown document.Onkeyup= showKeyUp document.Onkeypress= showKeyPress } function showKeyDown(evt) { evt = (evt) ? evt : window.event document.getElementById("pressKeyCode").innerHTML = 0 document.getElementById("upKeyCode").innerHTML = 0 document.getElementById("pressCharCode").innerHTML = 0 document.getElementById("upCharCode").innerHTML = 0 restoreModifiers("") restoreModifiers("Down") restoreModifiers("Up") document.getElementById("downKeyCode").innerHTML = evt.keyCode if (evt.charCode) { document.getElementById("downCharCode").innerHTML = evt.charCode } showModifiers("Down", evt) } function showKeyUp(evt) { evt = (evt) ? evt : window.event document.getElementById("upKeyCode").innerHTML = evt.keyCode if (evt.charCode) { document.getElementById("upCharCode").innerHTML = evt.charCode } showModifiers("Up", evt) return false } function showKeyPress(evt) { evt = (evt) ? evt : window.event document.getElementById("pressKeyCode").innerHTML = evt.keyCode if (evt.charCode) { document.getElementById("pressCharCode").innerHTML = evt.charCode } showModifiers("", evt) return false } function showModifiers(ext, evt) { restoreModifiers(ext) if (evt.shiftKey) { document.getElementById("shift" + ext).style.backgroundColor = "#ff0000" } if (evt.ctrlKey) { document.getElementById("ctrl" + ext).style.backgroundColor = "#00ff00" } if (evt.altKey) { document.getElementById("alt" + ext).style.backgroundColor = "#0000ff" } } function restoreModifiers(ext) { document.getElementById("shift" + ext).style.backgroundColor = "#ffffff" document.getElementById("ctrl" + ext).style.backgroundColor = "#ffffff" document.getElementById("alt" + ext).style.backgroundColor = "#ffffff" } 《SCRIPT》 Keyboard Event Handler Lab onKeyDownonKeyPressonKeyUp Key Codes 0 0 0 Char Codes (IE5/Mac; NN6) 0 0 0 Modifier Keys Shift Shift Shift Ctrl Ctrl Ctrl Alt Alt Alt [Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]