$(window).bind("load", function() {
var getheight = $(".maincontent").height();
if(getheight < 350) {
     getheight = 500;
     $("div.leftnav").css("min-height", getheight);

}
/*
if ($.browser.msie) {
     $("div.leftnav").css("min-height", getheight + 2);
 }
else {
$("div.leftnav").css("min-height", getheight);
}
*/
});