今天分享关于对搜索表单是否为空进行判断,如果为空,即弹出提示搜索关键词为空,代码如下:
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<!--搜索表单--> <script type= "text/javascript" > function notNull() {
if (document.keyinput.kw.value.toString().trim().length <= 0) {
alert( "您未输入关键词!" ); document.keyinput.kw.focus(); return false ; } else {
return true ; } } </script> <div class = "search clearfloat" id= "search" > <form method= "get" action= "http://www.zjkweiqi.cn/ search.php" class = "search-form" name= "keyinput" > <input type= "text" name= "kw" placeholder= "请输入商品/产品名,就能获取您需要的产品下载信息!" /> <button type= "submit" onclick= "return notNull()" >搜一下</button> </form> </div> <!--搜索表单--> |