var oMarquee1 = document.getElementById("mq1"); //滚动对象
var iLineHeight1 = 38; //单行高度，像素 
var iLineCount1 = 2; //实际行数 
var iScrollAmount1 = 1; //每次滚动高度，像素 

function run1() { 
oMarquee1.scrollTop += iScrollAmount1; 
if ( oMarquee1.scrollTop == iLineCount1 * iLineHeight1 ) 
oMarquee1.scrollTop = 0;
if ( oMarquee1.scrollTop % iLineHeight1 == 0 ) { 
window.setTimeout( "run1()", 8000 ); 
} else { 
window.setTimeout( "run1()", 60 ); 
} 
} 

oMarquee1.innerHTML += oMarquee1.innerHTML; 
window.setTimeout( "run1()", 8000 );