<div class="search"><input type="text" value="http://www.mamicode.com/Seach Products" onFocus="if(this.value=http://www.mamicode.com/=‘Seach Products‘){this.value=‘‘;this.style.color=‘#222‘;}" onBlur="if(this.value=http://www.mamicode.com/=‘‘){this.value=‘Seach Products‘;this.style.color=‘#e2e0e0‘}"></div>

input.text文件提示效果