function doMarquee(){
 var objMq1 = document.getElementById('mq1');
 var objMq2 = document.getElementById('mq2');
 var intMgn1 = objMq1.style.marginLeft.replace('px','');
 var intMgn2 = objMq2.style.marginLeft.replace('px','');
 if(intMgn1=='') intMgn1='0';
 if(intMgn2=='') intMgn2='900';
 intMgn1=eval(intMgn1);
 intMgn2=eval(intMgn2);
 intMgn1-=5;
 intMgn2-=5;
 if(intMgn1<-900) intMgn1=900;
 if(intMgn2<-900) intMgn2=900;
 objMq1.style.marginLeft=intMgn1+'px';
 objMq2.style.marginLeft=intMgn2+'px';
}