var agt = navigator.userAgent.toLowerCase ();
var is_major = parseInt (navigator.appVersion);
var is_minor = parseFloat (navigator.appVersion);
var is_nav  = ((agt.indexOf ('mozilla') != -1) && (agt.indexOf ('spoofer') == -1) && (agt.indexOf ('compatible') == -1) && (agt.indexOf ('opera') == -1) && (agt.indexOf ('webtv') == -1) && (agt.indexOf ('hotjava') == -1) && (agt.indexOf ('safari') == -1));
var is_nav6 = (is_nav && (is_major == 5) && (agt.indexOf ("netscape") != -1) && (agt.indexOf ("netscape/7") == -1));
var is_nav6up = ((is_nav && (is_major >= 5)) || (is_nav && (agt.indexOf ('netscape/7') != -1)));
var is_ie      = ((agt.indexOf ("msie") != -1) && (agt.indexOf ("opera") == -1) && (agt.indexOf ("safari") == -1));
var is_ie3     = (is_ie && (is_major < 4));
var is_ie4     = (is_ie && (is_major == 4) && (agt.indexOf ("msie 4")!=-1));
var is_ie4up   = (is_ie && (is_major >= 4));
var is_ie5     = (is_ie && (is_major == 4) && (agt.indexOf ("msie 5.0") != -1));
var is_ie5_5   = (is_ie && (is_major == 4) && (agt.indexOf ("msie 5.5") != -1));
var is_ie5up   = (is_ie && !is_ie3 && !is_ie4);
var is_ie5_5up = (is_ie && !is_ie3 && !is_ie4 && !is_ie5);
var is_ie6     = (is_ie && (is_major == 4) && (agt.indexOf ("msie 6.") != -1));
var is_firefox = ((agt.indexOf ("firefox") != -1) && (agt.indexOf ("opera") == -1) && (agt.indexOf ("safari") == -1));
var is_opera = (agt.indexOf ("opera") != -1);
var is_nn = ((is_nav6 || is_nav6up) ? true : false);


//if (is_opera) document.write("<style>.field .ilogin, .field .ipasw {height: 16px}</style>");
//if (is_ie && !is_ie5_5up) document.write("<style>.header_block {width: 770px}, .content_block {width: 770px}, .menu_block .min_width {width: 770px}, .footer_block .min_width {width: 770px}</style>");



function calcHeight(){
	var contentObject=document.getElementById("contentBlock");
	var footerObject=document.getElementById("footerBlock");
	var hiddenObject=document.getElementById("hiddenBlock");
	var contentHeight=contentObject.offsetHeight;
	var contentTop=contentObject.offsetTop;
	var footerHeight=footerObject.offsetHeight;
	var hiddenTop=hiddenObject.offsetTop;
	
	var top = contentHeight+contentTop+40;

	if (hiddenTop+10>top+footerHeight) top = hiddenTop-footerHeight + ((is_ie)?11:10);

	footerObject.style.left="0px";
	footerObject.style.top=top+"px";
	footerObject.style.position="absolute";
}

//window.onload=calcHeight;
//window.onresize=calcHeight;