images issue in IE7   

I am using MM_preloadImage() of java script. this function is 
working in IE6but not in IE7.at the time of pageloading all images are 
loading but after images loading i clicked redraw button then images is not 
loading. why pls give me answer 

My code spinning is---

function MM_preloadImages() { //v3.0 
alert("cursor inside MM_preloadImage"); 
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];} 
} 
}

date: Sun, 18 May 2008 23:25:02 -0700   author:   mithilesh