<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>alert</title> <script type="text/javascript"> function rec(){ var mychar="I love JavaScript"; alert("hello!"); alert(mychar); document.write(mychar) } function rec(){ var mymessage=confirm("Are you girl"); if(mymessage==true) { document.write("you are girl"); } else { document.write("you are boy!"); } } function rec(){ var score; //score变量，用来存储用户输入的成绩值。 score = prompt('input score'); if(score>=90) { document.write("good!"); } else if(score>=75) { document.write("good2!"); } else if(score>=60) { document.write("good3!"); } else { document.write("poor!"); } } function Wopen(){ window.open('http://www.imooc.com','_blank','height=600,width=400,top=100,left=0'); } function Woclose(){ var mywin=window.open("http://www.imooc.com"); mywin.close(); } </script> </head> <body> <input name="button" type="button" onClick="rec()" value="Click alert" /> <input name="button" type="button" onClick="rec()" value="Click confirm" /> <input name="button" type="button" onClick="pro()" value="Click prompt" /> <input name="button" type="button" onClick="Wopen()" value="Click Windowopen" / > <input name="button" type="button" onClick="Woclose()" value="Click Windowclose" / > </body> </html>