當獲焦時,文本消失,失焦時文本出現
<!doctype html> <html> <head> <meta charset="utf-8"> <title>無標題文檔</title> </head> <body> <input id="text" type="text" value="點我就消失"/> <script> var oText=document.getElementById("text"); var onoff=true; oText.color="#000"; oText.onfocus=function(){ if(onoff){ this.value=""; this.color="red"; onoff=false; } } oText.onblur=function(){ if(this.value==''){ this.color="#000"; this.value="點我就消失"; onoff=true; } } </script> </body> </html>