<input type="text" value="http://www.mamicode.com/请输入..." class="inp" onfocus="if(this.value=http://www.mamicode.com/=‘请输入...‘){this.value=‘‘};this.style.color=‘#666‘;" onblur="if(this.value=http://www.mamicode.com/=‘‘||this.value==‘请输入...‘){this.value=‘请输入...‘;this.style.color=‘#d2d1cf‘;}" />

input文字变色