Javascript:
function disableSelection(target){
if (typeof target.onselectstart!="undefined") //IE route
target.onselectstart=function(){return false}
else if (typeof target.style.MozUserSelect!="undefined") //Firefox route
//-moz-user-select:none
target.style.MozUserSelect="none"

else //All other route (ie: Opera)
target.onmousedown=function(){return false}
target.style.cursor = "default"
}

//Sample usages
//disableSelection(document.body) //Disable text selection on entire body
//disableSelection(document.getElementById("mydiv")) //Disable text selection on element with id="mydiv"

CSS:

-moz-user-select: none;
-khtml-user-select: none;//webkit

HTML for IE
element.setAttribute('UNSELECTABLE',on)

给panel设置

    -webkit-user-select: none;
       -moz-user-select: none;
        -ms-user-select: none;
            user-select: none;