onkeypress字符按键兼容所有浏览器使用介绍_javascript技巧

document.onkeypress = function( e ){
alert( getCharCode( e ) );
};
function getCharCode( e ){
var e = e || window.event;
if( typeof e.charCode == "number" ){
return e.charCode;
}else{
return e.keyCode;
};
};