话不多少,直接附上代码实例,仅供参考
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<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd" > <html xmlns= "http://www.w3.org/1999/xhtml" > <head> <title></title> <script type= "text/javascript" > function validation() { var val = document.getelementbyid( "txtnumber" ).value; var regu = /^(\-|\+)?\d+(\.\d+)?$/; if (val != "" ) { if (!regu.test(val)) { document.getelementbyid( "labresult" ).style.color = "red" ; document.getelementbyid( "labresult" ).innerhtml = "验证失败!" ; } else { document.getelementbyid( "labresult" ).style.color = "green" ; document.getelementbyid( "labresult" ).innerhtml = "验证成功!" ; } } } </script> </head> <body> <input id= "txtnumber" name= "txtnumber" type= "text" /> <input id= "btnvalidation" name= "btnvalidation" type= "button" value= "校验" onclick= "validation()" /> 验证结果:<label id= "labresult" ></label> </body> </html> |
以上就是本文的全部内容,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流,同时也希望多多支持服务器之家!