[\u4e00-\u9fa5]
<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>title</title> </head> <body> 请输入您的名字:<input type="text" value="" id="username" />*<br /> <script> //是中文名字,则绿色,否则红色 document.getelementbyid("username").onblur = function () { var reg = /^[\u4e00-\u9fa5]{2,6}$/; if (reg.test(this.value)) { this.style.backgroundcolor = "green"; } else { this.style.backgroundcolor = "pink"; } }; </script> </body> </html>
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