javascript搜索框效果实现方法

Z时代
2024-01-10
分类：综合

本文实例讲述了javascript搜索框效果实现方法。分享给大家供大家参考。具体实现方法如下：


<!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 == "请输入关键字" || this.value == "") {
      this.value = "";
      this.style.color = "black"; //修改文本框字体颜色
    }
  }
  txtSearch.onblur = function () {
    if (this.value == "请输入关键字" || this.value == "") {
      this.value = "请输入关键字";
      this.style.color = "red";  //修改文本框字体颜色
    }
    else {
      this.style.color = "black";
    }
  }
}
</script>
</head>
<body onload="iniEvent()">
<!--文字离开如果文本框为空则显示红色的"请输入关键字"-->
<!--<label for="txtSearch">查找</label>
<input type="text" id="txtSearch" value="请输入关键字" 
style="color:red" />-->
查找<input type="text" id="txtSearch" value="请输入关键字" 
style="color:red" /><br /><input type="text" />
</body>
</html>