function Sizer() {
	winWidth = (document.all)?document.body.clientWidth:window.innerWidth;
	//alert(winWidth);
	if (winWidth>760) {	
  	var objTop = document.getElementById("top").offsetHeight;	
  	var objContent = document.getElementById("content").offsetHeight;
  	var objleftColumn = document.getElementById("leftColumn").offsetHeight;
  	
  
  	//alert("objContent="+objContent);
  	//alert("objleftColumn="+objleftColumn);
  
    	if (parseInt(objContent)>455) {
    		obj = (objContent - objTop) + 131;
    		var leftC = document.getElementById("leftColumn");
    		leftC.style.height = obj+"px";
    	}
    	else {
  			//alert("sono qui");
  			obj = "400px";
    		var leftC = document.getElementById("leftColumn");
    		leftC.style.height = obj;
  			
    	}
	}
	
	
}

window.onresize = Sizer;
window.onload = Sizer;