代码语言：javascript复制
//圆形图片
<input type="image" src="images/clear.jpg" style="border-radius:25px;" width="50">
//隐藏
<input type = "hidden" placeholder="账号" >
<input type="text" name="" value="" style="display:none">
<input type = "hidden" class="" id="" name="" value="">
//不修改
<input type="text" readOnly="true" />//input value 传递参数》》》》》》》》》》》
<input type="button" value="检测ISBN是否存在" class="button" id="button" onClick="aa()">
<script>
var str;
function aa(){
str=document.getElementById("isbn").value;//把文本框值赋值给变量str
if(str=="")
alert("ISBN为空");
else
location.href='jc.jsp?isbn=' str;
//alert(str);
}
</script><input type="text" class="text" value="Address" onfocus="this.value = '';" onblur="if (this.value == '') {this.value = 'Address';}">
<textarea rows="10" cols="70" onfocus="if(this.value == 'Message') this.value='';" onblur="if(this.value == '') this.value='Message';" >Message</textarea>
