如何能让图片在放大缩小之间来回切换???

Question

<img src=http://expert.csdn.net/images/csdn.gif border=0 oriWidth="0" 
 onload="this.oriWidth=this.clientWidth;if(this.clientWidth>100){this.width=100}"
 onclick="if(this.width<this.oriWidth){this.width=this.oriWidth;}else{this.width=100;}"
 >

Answer 1

能再解释一下clientWidth和oriWidth的用法，与区别吗？？谢谢

Answer 2

<img id=oImg src=http://expert.csdn.net/images/csdn.gif border=0 value=0>
<br>
<hr>
<br>
<script language=javascript>
oImg.onclick=function()
{
if (oImg.getAttribute("value")=="0") 
{
oImg.setAttribute("value","1");
var w=oImg.width;
var h=oImg.height;
oImg.width =w*2;
oImg.height =h*2;
}
else
{
oImg.setAttribute("value","0");
var w=oImg.width;
var h=oImg.height;
oImg.width =w/2; 
oImg.height =h/2;
}
}</script>