本文實例講述了javascript搜索框效果實現方法。分享給大家供大家參考。具體實現方法如下:
<!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> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>搜索框效果</title> <script type="text/javascript"> function iniEvent() { var txtSearch = document.getElementById("txtSearch"); txtSearch.onfocus = function () { if (this.value == "請輸入關鍵字" || this.value == "") { this.value = ""; this.style.color = "black"; //修改文本框字體顏色 } } txtSearch.onblur = function () { if (this.value == "請輸入關鍵字" || this.value == "") { this.value = "請輸入關鍵字"; this.style.color = "red"; //修改文本框字體顏色 } else { this.style.color = "black"; } } } </script> </head> <body onload="iniEvent()"> <!--文字離開如果文本框為空則顯示紅色的"請輸入關鍵字"--> <!--<label for="txtSearch">查找</label> <input type="text" id="txtSearch" value="請輸入關鍵字" style="color:red" />--> 查找<input type="text" id="txtSearch" value="請輸入關鍵字" style="color:red" /><br /><input type="text" /> </body> </html>
希望本文所述對大家的javascript程序設計有所幫助。