大家看下这段代码
<tr><td><input type="text" value="" class="inputStart" /></td><td><input type="text" value="" class="inputStart" /></td></tr>
<tr><td><img onMouseOut="MM_swapImgRestore()"
onMouseOver="MM_swapImage('add03','','images/soSelect.PNG',1)" src="images/soNoSelect.PNG" width="20" height="20" style="cursor:hand" name="add03" /></td><td><img onMouseOut="MM_swapImgRestore()"
onMouseOver="MM_swapImage('add02','','images/soSelect.PNG',1)" src="images/soNoSelect.PNG" width="20" height="20" style="cursor:hand" name="add02" /></td></tr>
</table> </td>
<td rowspan="2" ><img onMouseOut="MM_swapImgRestore()"
onMouseOver="MM_swapImage('add01','','images/select.PNG',1)" src="images/selectNo.PNG" width="20" height="20" style="cursor:hand" name="add01" /></td>
<td width="390" class="font_lan12px">选定值</td>
</tr>
里面有几个js函数MM_swapImgRestore(),MM_swapImage()调用下面的js函数代码为
<script type="text/JavaScript">
<!--function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments;
document.MM_sr=new Array;
for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){
document.MM_sr[j++]=x;
if(!x.oSrc) x.oSrc=x.src;
x.src=a[i+2];
}
}
//-->
</script>我是想不通的是,为什么调用:MM_swapImage('add01','','images/select.PNG',1)是传递了若干个参数,然而,事实上这个函数是不需要传递参数的呀,那为什么要这样做?
这样做,js能调用函数吗?
<tr><td><input type="text" value="" class="inputStart" /></td><td><input type="text" value="" class="inputStart" /></td></tr>
<tr><td><img onMouseOut="MM_swapImgRestore()"
onMouseOver="MM_swapImage('add03','','images/soSelect.PNG',1)" src="images/soNoSelect.PNG" width="20" height="20" style="cursor:hand" name="add03" /></td><td><img onMouseOut="MM_swapImgRestore()"
onMouseOver="MM_swapImage('add02','','images/soSelect.PNG',1)" src="images/soNoSelect.PNG" width="20" height="20" style="cursor:hand" name="add02" /></td></tr>
</table> </td>
<td rowspan="2" ><img onMouseOut="MM_swapImgRestore()"
onMouseOver="MM_swapImage('add01','','images/select.PNG',1)" src="images/selectNo.PNG" width="20" height="20" style="cursor:hand" name="add01" /></td>
<td width="390" class="font_lan12px">选定值</td>
</tr>
里面有几个js函数MM_swapImgRestore(),MM_swapImage()调用下面的js函数代码为
<script type="text/JavaScript">
<!--function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments;
document.MM_sr=new Array;
for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){
document.MM_sr[j++]=x;
if(!x.oSrc) x.oSrc=x.src;
x.src=a[i+2];
}
}
//-->
</script>我是想不通的是,为什么调用:MM_swapImage('add01','','images/select.PNG',1)是传递了若干个参数,然而,事实上这个函数是不需要传递参数的呀,那为什么要这样做?
这样做,js能调用函数吗?
不是定义了有3个参数了吗!
不过这种方式我也是第一次见!哈……
的意思
var i ;
var j=0;
var x ;
var a=MM_swapImage.arguments;