脚本控制自适应高度的缩短问题_javascript技巧

function vvheight() {
    var CL=document.getElementById("content-left");
    var CR=document.getElementById("content-right");
    while(parseInt(CL.scrollHeight)==parseInt(CL.style.height)){CL.style.height=parseInt(CL.style.height)-30+"px"}
    var sideleft=CL.scrollHeight;
    while(parseInt(CR.scrollHeight)==parseInt(CR.style.height)){CR.style.height=parseInt(CR.style.height)-30+"px"}
    var sideright=CR.scrollHeight;
    layoutHeight=Math.max(sideleft,sideright);
    CL.style.height=layoutHeight+"px";
    CR.style.height=layoutHeight+"px";
}