//JavaScript Document

var equalHeight={
    oLeft:document.getElementById("sidebar"),
    oRight:document.getElementById("content_main"),
    doEqual:function(){
        //alert(equalHeight.oLeft.scrollHeight+"---"+equalHeight.oRight.scrollHeight);
        if(equalHeight.oLeft.scrollHeight<equalHeight.oRight.scrollHeight){
            equalHeight.oLeft.style.height=equalHeight.oRight.scrollHeight+"px";
        }else if(equalHeight.oLeft.scrollHeight>equalHeight.oRight.scrollHeight){
            equalHeight.oRight.style.height=equalHeight.oLeft.scrollHeight+"px";
        }
    }
}
equalHeight.doEqual();