input输入框删除文字效果js代码

js代码

<script type=\"text/javascript\">
document.getElementById(\"search\").addEventListener(\"keyup\",function(){
	if(this.value.length>0)
	{
		document.getElementById(\"cls\").style.visibility=\"visible\";
		document.getElementById(\"cls\").onclick=function()
		{
			document.getElementById(\"search\").value=\"\";
		}
	}else
	{
		document.getElementById(\"cls\").style.visibility=\"hidden\";
	}
});
</script>