给图片加链接 仔细看

Question

 <input type="image" name="imageField2"src="/person/images/a5.gif" border="0" id="jinyong" />
<script type="text/javascript">
var jinyongniantie=document.getElementById("jinyongniantie").value;//接收过来的值TRUE或者FALSE
if(jinyongniantie== true)
document.getElementById("jinyong").src="/person/images/niantiehui.gif";
else
document.getElementById("jinyong").src="/person/images/a5.gif";
</script>
判断 如果jinyongniantie等于FALSE 改变图片，并且加上链接 ，链接该怎么加呢？

Answer 1

var jinyongniantie=document.getElementById("jinyongniantie").value;
alert(jinyongniantie);
你先看看jinyongniantie值为好多？
如果确定这个值没有问题 
if(jinyongniantie== true)
    document.getElementById("jinyong").src="person/images/niantiehui.gif";
else
    document.getElementById("jinyong").src="person/images/a5.gif";注意路径person前面没有"/"；

Answer 2

你的jinyong是input控件，不是img控件，加里面干嘛？如果想打开其他页面，可以加onclick事件，然后window.open打开连接<input type="image" name="imageField2"src="/person/images/a5.gif" border="0" id="jinyong" />
<script type="text/javascript">
    var jinyongniantie=document.getElementById("jinyongniantie").value;//接收过来的值TRUE或者FALSE
    if(jinyongniantie== true)
    document.getElementById("jinyong").src="/person/images/niantiehui.gif";
    else{
    document.getElementById("jinyong").src="/person/images/a5.gif";
document.getElementById("jinyong").onclick=function(){
  window.open('http://www.code-design.cn');//打开连接
  return false;//如果这个input放在表单里面会在点击时提交表单，return false可以阻止表单的提交
}
        }</script>

Answer 3

if(...="true")
else
(...="false")取出来的值 是字符串都是true

Answer 4

value是字符串，判断用""
<script type="text/javascript">
    var jinyongniantie=document.getElementById("jinyongniantie").value;//接收过来的值TRUE或者FALSE
    if(jinyongniantie== "true")
    document.getElementById("jinyong").src="/person/images/niantiehui.gif";
    else
    document.getElementById("jinyong").src="/person/images/a5.gif";
        </script>