web前端|html教程
html,触发,按键
web前端-html教程
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实例
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当用户按键时执行一段 JavaScript：
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浏览器支持
IE
Firefox
Chrome
Safari
Opera
所有主流浏览器都支持 onkeypress 属性。
定义和用法
onkeypress 属性在用户（在键盘上）按键时触发。
提示：相对于 onkeypress 事件的事件次序：
onkeydown onkeypress onkeyup
注释：在任何浏览器中，onkeypress 事件不会被所有按键触发（例如 ALT、CTRL、SHIFT、ESC）。
注释：onkeypress 属性不适用以下元素：、、、、、、、、、
或
。<p>HTML 4.01 与 HTML5 之间的差异</p><p>无。</p><p>语法</p><p>属性值</p><p><input type="text" name="PAGE" size="60" maxlength="2" value="" onkeypress="if(event.keyCode57) event.returnValue=false;"></p><p>报错：</p><p>Multiple annotations found at this line:- Invalid character used in text string (57) event.returnValue=false;">).- Syntax error on token "||", ) expected- Attribute value (if(event.keyCode<48 || ) not closed.- Undefined attribute name (event.keyCode).</p><p>把大于57放在前面就对了。。。亲试</p><p></p></p>
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