var oMarquee2 = document.getElementById("mq2"); //滚动对象
var iLineHeight2 = 38; //单行高度，像素 
var iLineCount2 = 2; //实际行数 
var iScrollAmount2 = 1; //每次滚动高度，像素 

function run2() { 
oMarquee2.scrollTop += iScrollAmount2; 
if ( oMarquee2.scrollTop == iLineCount2 * iLineHeight2 ) 
oMarquee2.scrollTop = 0;
if ( oMarquee2.scrollTop % iLineHeight2 == 0 ) { 
window.setTimeout( "run2()", 8000 ); 
} else { 
window.setTimeout( "run2()", 60 ); 
} 
} 

oMarquee2.innerHTML += oMarquee2.innerHTML; 
window.setTimeout( "run2()", 8000 );