function meretez()
	{
	mainh=document.getElementById("div_main").offsetHeight ;
	menuh=document.getElementById("div_menu").offsetHeight ;
	 var myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myHeight = document.body.clientHeight;
  }

	document.getElementById("div_bg").style.height=myHeight+"px";
	bgh=document.getElementById("div_bg").offsetHeight ;

	if(mainh<310 && menuh<310)
		{
		document.getElementById("div_main").style.height="310px";
		document.getElementById("div_menu").style.height="290px";
		document.getElementById("div_main_elvall").style.height="310px";
		document.getElementById("div_box1").style.height="340px";
		if(bgh<(310+285))
			{
			document.getElementById("div_bg").style.height=(310+285)+"px";
			}
		}
	else if (mainh>menuh)
		{
		document.getElementById("div_main").style.height=mainh+"px";
		document.getElementById("div_menu").style.height=(mainh-20)+"px";
		document.getElementById("div_main_elvall").style.height=mainh+"px";
		document.getElementById("div_box1").style.height=(mainh+30)+"px";
		if(bgh<(mainh+285))
			{
			document.getElementById("div_bg").style.height=(mainh+285)+"px";
			}
		}
	else
		{
		document.getElementById("div_main").style.height=(menuh+20)+"px";
		document.getElementById("div_menu").style.height=menuh+"px";
		document.getElementById("div_main_elvall").style.height=(menuh+20)+"px";
		document.getElementById("div_box1").style.height=(menuh+50)+"px";
		if(bgh<(menuh+285))
			{
			document.getElementById("div_bg").style.height=(menuh+305)+"px";
			}
		}
	}