js三种消息框消息框
警告框alert
<html> <head> <script type="text/javascript"> function disp_alert() { alert("这是" + '\n' + "警告框。") } </script> </head> <body> <input type="button" onclick="disp_alert()" value="显示警告框" /> </body> </html>
确认框confirm
<html> <head> <script type="text/javascript"> function show_confirm() { var r=confirm("单击一个按钮!"); if (r==true) { alert("你点了确定!"); } else { alert("你点了取消!"); } } </script> </head> <body> <input type="button" onclick="show_confirm()" value="Show a confirm box" /> </body> </html>
提示框
<html> <head> <script type="text/javascript"> function disp_prompt() { var name=prompt("请输入您的名字","Tomy") if (name!=null && name!="") { document.write("你好!" + name + " 今天天气不错哦~") } } </script> </head> <body> <input type="button" onclick="disp_prompt()" value="显示提示框" /> </body> </html>